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In my post in this thread I caution the developer against falling into the traps that BB and MotH fell into. Their grind is not normal. It isn't how a game should play. Its unimmersive and frankly lazy. There is a way to create a dating sim with some intelligence. First rule, don't make the women dead fish that your MC has to slowly convince to have sex with him. Make them their own characters with their own experiences (or lack of) with their own desires, and with their own motivations. In MotH the the only character that fits all three of those is the little sister. The older sister has none of them and the mother only has desire because of a contrived coincidence. Women don't just fall for the dick man, sorry to break it to you.
After you've written women with all of the above there are ways to make you court them without repeating the same things over and over and over and over and over and over and over and over and over and over and over and over and over again. Instead make the characters do something together because they want to. In the case of MotH there are plenty of ways this could have been implemented, but mostly it was just grind.
Lets start with little sis, because quite frankly she's the only believable character in this game. She's curious about sex and attracted to her strong smart helpful older brother. Honestly the first little bit, how you get started with her, make sense. You help her with what should be different homework every night. Write it, sure math isn't interesting, but its a hell of a lot more interesting than clicking through some bullshit. Have a specific element of the math that she's working on. Make it something simple even like a^2 + b ^2 = c^2. Work a few simple equations with her. Then the next day, do another subject. History, for instance, help her write an essay on WWII or something, Make a few simple mentions of DDay or how Hitler killed himself, make a reference to pearl harbor, nagasaki, hiroshima, etc.The next day (remember the rule of 3) have her need help with anatomy. Have the conversation be about reproduction organs and orgasms and semen and ovaries. At that point have her say something to him about sex. Have her ask if he'd like to try kissing her.
There you have a "grind" because you have to clear a few hurdles to get to that point, but those hurdles aren't repeated, you would be likely to do them in real life, and they provide the opportunity for character growth. From there have her watching a movie one day, not every fucking day, just once after the biology thing is cleared. You choose to sit with her and watch this romance movie that makes her all nervous around you, blushing and giggling. Then give you the option to kiss her. Boom, you don't just kiss a little, you kinda make out till you hear mom get out of the bathroom upstairs, and quickly pretend you were just watching the movie. Boom, now you've advanced that relationship again, you're both having lust filled thoughts about one another.
After you've cleared that you could have her start sending him sexy bikini pics from the store. Something she's doing because she likes him. Have her be more affectionate, hugs that linger, kisses on the cheek or lips when no one's looking etc. Then have her come to you for homework help again, this time it doesn't matter what, but the real reason is going to be that she wants him alone in her room so that she can make out with him. You could have them make out and heavy pet over the clothes to orgasm like the game already does here. This is the point at which their relationship has changed from just being a curious bro and sis kissing sometimes to something with actual lust.
Have the sister avoid you for a day or two, building up your need for a release because you want her but can't have her. Again actual quality writing comes in here. Because these games usually just let you loose to your own devices this kind of shit doesn't happen. But because of whats happened force an event where you look up porn. Your sister hears it and comes in to catch you mid fap. She's curious, she wants to see. This scene is also already in the game, but its now organic, boom, she gives you her first blowjob. She likes having helped you get off. It makes her feel sexy and wanted.
The next day have her invite you to watch a move with her in a theatre or something. Have her choose the horror movie because she knows that its normal for girls to cling to their date at scary moments. It gives them a reason to be close. It also opens up the first time she sleeps in your bed. But neither of them can just sleep and they end up making out, this time you please her, going down on her she cums and falls asleep satisfied and naked in your arms.
Next day have her send him a naked selfie from the bathroom saying come here, I need you. Bam you have your bathroom scene only, make them please one another, even if this is another blowjob and pussy eating, make sure they keep up their relationship. Have them almost get caught here, her shoving you underwater while mom comes in to check on her. This creates tension and makes it a little hotter. Because the heat is on she sleeps alone in her even though she enjoyed you last time.
A few days pass now, kisses and heavy petting happen but keep getting interrupted for some reason before finally she gets the courage to come to your room again. This time in nothing but a shirt. Tonight you two have sex for the first time. Make it sweet, make her feel good, make her want to make him feel good, show the blood, most people have a virgin fetish, have him make love to her make sure she has an orgasm from his dick insider her, and make her beg him to cum inside.
The next day you both wake up in panic, have him go buy plan b, keep her from getting pregnant and have her get an appointment for birth control. Here is where he buys her the sexy lingerie, have her mention it just like she does in game. Then in a few days, have her come to him in lingerie this time, have them fuck again and again that night. They're too far gone now.
Here is where she should somehow make a comment about being curious about sex with a girl, kind of make her coyly float the idea of a threesome, but make no commitment. A few days later (fucking every night now) have her call him into her room to help with some homework again. You go in to find her with the friend. She has convinced her to have this experience, apparently she knew her friend already had a crush on you and she convinced her to join you. Bam, make this scene a bonafide threesome instead of just the two of them blowing you. Now you have this option to include her in your fun sometimes.
I would keep this going, have her do the sexy school girl look, have her continue to call you into the bath sometimes, have her get curious about anal, seriously her character is a gold mine for trying all kinds of different depraved shit. She's curious and you're her willing training wheels.
Seriously cut all the affection gaining content where you have to greet her in the morning and say she looks good. Cut all the forced grind. Just have events that come one after another on a progressive scale. It would be a million times more erotic. Then, after you've satisfied yourself with her story, start on big sis or mom. If you want big sis to turn out to be a sub who loves to be treated like shit, that's fine, have him find that out. Make the reason she gets arrested not be about her being a bitch to someone in the bar, have it about one of her regular customers forcing her to work without panties, wearing a vibe or something, have him make her approach a guy and lift her skirt to grind on him. Have that man's wife be a cop who is coming back from the bathroom and arrests her under those circumstances. Have your character find all this out through the police report and the friend.
After you've put the pieces together use it for blackmail on her. This blackmail would be so much better than the flimsy one originally. It wouldn't just be her job or her being arrested, it would also be her reputation. She isn't ready to have her mom look at her after she finds out that she is a little slut who works with a vibrator in her pussy because it makes her feel good, she isn't ready to have her boss find out she's breaking the rules and actually having sex with a patron. No, you're going to get her now. Then have him step it up with the chores, then the maid outfit, then the spanking, similar to how it already does, only take out the grind. Have him start her on chores the next day, then head to the store because he realizes it would be fun to have her wear a maid outfit, make her wear it, the blackmail is actually good this time, so while she should still fight, she should give up.
So, you have her doing chores, but she decides to fight again, she tells you to go fuck yourself when you tell her to scrub the toilet. So you grab her by the hand, take her to the bathroom grab the toilet wand and toss it out of the bathroom. Force her to her knees and tell her that she's going to clean the toilet with her tongue for disobeying you. She fights, so he spanks her. This surprises her, but also arouses her, she fights a little longer before finally she starts licking the toilet clean. When she finishes, she says she's sorry master, that she'll be good. You haven't told her to call you master.
The next time she decides to disobey you can be the one where she's tossing the clothes all over the bathroom. Here you realize that she likes being punished, by you. So you tell her, you have something new in mind. You make her suck your dick instead. After forcefully throat fucking her, she decides to obey you for the next few days. You decide to reward her, same idea, you finger her, maybe even eat her out. Its here that you tell her you want her to stop wearing panties, at all. You go to find her at work check to make sure, just like it already happens, then the friend approaches you about it. She hints heavily that she wants your sister. You remember this.
The next week progresses with you fingering her, spanking her, etc until the end of the week where you tell her she's earned a reward. You tell her you'll come pick her up from work. Have her beg you to finger her in the cab, but then edge her, don't let her cum. Take her to her room and edge her again with your tongue this time, now she's begging for release, she's willing to be fucked by her brother just to get off. You give her what she wants, you fuck the shit out of her and cum inside. You aren't gentle like you were with the little sister, you cum inside and don't care if she gets pregnant.
Now that you've got her fucking you you step things up, you get her to deep throat you in the cab, you fuck her ass, etc. Once you know she's yours you invite the friend. I'd have the two of them spit roast her, and finish it up with DP, you choose ass or pussy. Now you can include the friend after work if you ever want to. I'd also include an option to get little sis in on this, if she's complete. When you're satisfied with this line you move on to mom.
Mom should be the hardest. And she should be completely rewritten. Honestly, in order to get the mom the prerequisite should be that you're already fucking both sisters, so they are more than willing to talk about how great you are. On top of that, you should have a Job and be contributing to the bills. No financial crisis, but make sure that you're paying like half. At this point have mom have a guy over. Have him try to force himself on her tearing her clothes off, literally torn and tattered making her unable to hide her nakedness when you have MC burst in and stop him. Drag him out in a chokehold and throw him out on his ass. All of this combined and now your mom sees you not just as her son, but as a man.
You are still gonna have to work here. The next day you check on your mom, she's tense, sitting on the couch. You offer to sit with her. She isn't ready to talk about it. You offer her a massage and she reluctantly agrees. You start on her shoulders and back, then move down to her legs and feet. She finally asks you to stop. I don't like the idea of getting her drunk so that you can go farther here, so i'd scrap that. Instead a few days later have him check on her again. Have her seem a little more comfortable, but have her ask for a massage this time. Boom now she's involved in this. She's still gonna be reluctant, but it was her choice to ask for another massage.
Now you overhear the conversation between her and your aunt. She talks about how ever since that night you've been a little sexually frustrated and you didn't know why. Have her explain how good it felt to have your hands on her, how wrong it felt. Have her mention the dick again. Here's the catch here, your mom has started to see you as a man. So now, have you go meet her at yoga in the morning. This is where she first notices that she makes you hard. That makes her feel sexy, desired, wanted. She notices she's wet.
Now you can have her discover you naked and alone in bed with your big dick out. I'd just have her stand there at the door and watch for a minute until she finally closes the door in shame. Overhear another conversation between her and her sister in which she mentions that she went to a forum to look for advice to the weird feeling she's having about you recently. Sneak in while she's in the bath to find her email, just like the game already does. I kinda like the idea of a psychiatrist convincing mom its ok. It works in A View of Family, and it works in this. So you still do the email yourself. You take over, getting your mom to loosen up around you. Have her lose composure after a massage and kiss you.
Second email time. You respond asking if she's talked to you about how you feel. She comes to you, you tell her that you're ok with it, if she is. You kiss again, this time it gets hot and heavy. She leaves flustered. She emails again. This time she tells you that you are interested. So you respond that its natural. You should let yourself feel what you want, let him feel what he wants. have her take you on a date. Give you the opportunity to pay for it. Make her get drunk, not because you want to take advantage of her, but because she wants to lose some inhibition. She takes you home, but invites you to her room. She gives you a blowjob and lets you cum on her tits. She says that's far enough for now.
Have 2 more dates. After the first of these, have her be too reluctant to do anything, but have her ask if you want to go on another date with her. If you choose yes, then she kisses you passionately, but she tells you that she's not ready for more, wants to take this a little slow. On date three make MC offer her another massage. This massage leads to him stripping her and going full erotic massage to finger her and make her cum. Have her plan a vacation with just you... even if its a hotel room in the city for a night, something so that she can fuck you away from her daughters. That night at the hotel you have sex all night long.
Move this relationship as much as it needs to. Honestly I don't see mom being corrupt enough to have sex with you and her daughters. So I don't suggest a threesome route here. But have her give anal and tit fucks and things like that. Make her worth deciding to sleep with that night. In the end I'd leave the game open ended. Have a message play that you've reached the end of the game, feel free to save here, you'll be able to replay any sex scene you want from her on out. Boom. 1000x better game. Still gives you a harem and you have to make the right decisions to get here.