Now that I think about it, there's room for a second part if you leave the door open (Sophia can suggest that maybe they could play together again and Dylan says I'll think about something, mom).
This second part would be a sort of roleplay, similar to the one Sophia was playing with Liam when the kids saw her wearing the red lingerie.
It has to do with her (she'd be Mrs Parker at the beginning) coming to a job (maid) interview. You could start at the living room where the three of them (Dylan and Sam would be the owners) would discuss terms, and there would be a testing phase. During this time they would evaluate her job and she should be wearing different outfits as they'd have to choose one that was acceptable for the other members of the family. She would have to address them as Sirs.
Once agreed, we can start the main story.
1st stop, the kitchen. At this point she's still trying to look professional. She'll be wearing a not-too-short skirt and her cleavage won't be too revealing.
With the two of them sitting there, she's doing some cleaning. While she's preparing some coffee for them, they will ask her to get something from a top cabinet, forcing her to use a chair which will reveal her panties.
Before the end of this stage, they'll ask to check the uniform and there will be some groping. Of course she'll pretend to be surprised and a little bit pissed off, but they will continue with the "we must be sure this is the right one.. we're just thinking about the family" excuse. You can add some spicy stuff by making her speak french for a moment (kinda sounds cool for a maid): "oh, mon dieu!"
After that, they ask her to use the second outfit and the story moves to the 2nd stage.
2nd stop, the living room. Now she's far more daring. She'll be wearing an uniform similar to the one used by Nathalie (the true maid), with a far shorter skirt, wide open cleavage and tiny panties (either a thong or just transparent panties).
She'll start doing some cleaning in front of them by the TV while they're on the couch, and she'll be bending quite a lot, showing them her ass. Then she'll come to clean the table in front of them, showing her neckline and her nipples while bending again.
Next she gets literally on top of one of them, putting her tits on his face while trying to clean the top of the sofa. The other one will be groping her legs, pretending to be checking the uniform.
Now that they've seem her change of attitude, they can be more straightforward and Dylan will ask her to properly clean a very specific place (his cock, or maybe their cocks). Besides she has to do it manually as this place is very delicate, and this way this stage includes handjobs. They will cum and she will have to clean the mess by swallowing all of it.
Final stop, by the pool (the same place where the bikini show was set). She will have to wear the transparent bikini to make it even more hot (not to mention how daring it is to be outdoor).
The guys will be sitting there, waiting for some drinks, and by the time she gets there, she will drop them by accident.
As a result, she will have to be punished. You can use something like this:
Dylan: "First you come to our own house teasing us with those dirty dresses (the ones they provided hehe) and now you've ruined our expensive deck chair?"
Sophia: "I'm really sorry, Sir. Is there anything I can do? Anything Sir, I really need this job."
Dylan: "No! Well, actually you can, but first of all you must be punished for your mistakes. And from now on, you'll be our little
slut and you'll address us as Masters. Do you understand, little slut?"
Sophia: "Yes Sir. I mean, yes Master".
Dylan: "Good. Now get on your knees.."
I guess you can continue at this point. However, and considering they're now more confident, I'd add some spanking at some point (not too rough) which would make Sophia even more horny seeing how dominant they've become. She'd definitely love it and she'd be more and more submissive.
All combined (what's already happened during the fashion show + having sex outdoor + being dominated even if it's just a little bit) she'd get the best sex of her entire life.
So, sounds good? For me it's really really hot, and is somehow compatible with your story, now that they've had sex, but still continues with the roleplay concept (the first one was a model at the bikini show, the second one is a sort of MILF show and this one is a maid show).
Regards
And now it's time for the final part of the story.
A couple days after the maid show, and even though they've been having sex together quite often, they feel like they need to take it even further.
One morning, while Liam hasn't still returned from his business trip, but with Ellie at home, Sam joins the three of them for breakfast. At some point Sophia drops a knife
accidentally, and while she's down looking for it, she decides to tease the boys by touching their cocks while Ellie's still next to them. In a way it's like she wanted to be caught, which makes it even more exciting.
With the guys and Sophia horny as hell, they go straight to the living room to have sex the moment Ellie goes out for a run.
In the middle of the action, with Sophia being on all fours, Ellie shows up far earlier than expected and catches them.
Ellie: Mom?? What..??
Sophia: Ellie?? What are you doing here??
Ellie: I just forgot my watch. What is this??
Sophia knows there's no way to undo what's already done. She stands up and goes directly to Ellie.
Sophia: Honey, you know everybody has their urges.. In my case I found what I was looking for closer than I thought.
Ellie: But mom..
Sophia: Sshh..
She plants a kiss on Ellie's mouth, who's caught by surprise, unable to react. As the kiss goes on, Ellie gets more and more relaxed and starts enjoying it.
The kids can't believe what they're seeing. They're shocked by the image of Sophia kissing Ellie, but eventually they understand what's really going on and sit on the sofa to enjoy the view.
Slowly it all becomes more hot, and what started with a kiss, ends up in a 69 with both Sophia and Ellie eating each other. Then Sophia makes a move.
Sophia: Are you guys going to stay there? We could use some help here.
They can't believe what Sophia has just said. Are they really going to have the chance to fuck Sophia and Ellie? Of course they don't need to be asked twice, and they join them right away.
With the four of them having sex together, they keep changing poses from time to time. From two "couples" fucking in parallel to threesomes in both FFM and FMM format (always with an 4th one providing some extra
support).
Next day Sam comes again for breakfast, but by the time he enters the kitchen, only Ellie is there.
Sam: Hey, Ellie, what are you eating for breakfast?
Ellie: Just some pancakes (she hasn't seen Sam yet)
Then Sam gets right next to her and turns Ellie's face towards him.
Sam: Wouldn't you like something else?
Ellie is quite surprised after seeing Sam's boner by her side.
Ellie: You know what? I've changed my mind. I think I'll go for some meat.
She starts sucking his cock and, just a moment later, Sophia enters the kitchen.
Sophia: Hey honey. I see you're enjoying your breakfast. Mind if I join you?
Ellie: Came hiir mom (it's hard for her to answer with Sam's cock's inside her mouth hehe)
Just a little later Dylan arrives.
Dylan: Hey, there's room for one more?
Sophia: Sure, honey. Come here, I'm still hungry.
After having been sucking their cocks for a while, Sophia decides to move the scene to the living room, where they continue doing their job, and at some point:
Ellie: Please keep going, I'll be back in a minute.
A minute later, Ellie shows up wearing a strap-on, the one she bought after Julia's event.
Ellie: I was saving this for a special occasion. Mom, I'm going to fuck you really hard.
Sophia is more than surprised. She didn't see it coming and didn't expect Ellie to be so bold.
Ellie: Now mom, start riding Dylan on the floor.
Once they begin, Ellie starts fucking Sophia's ass from behind as hard as she can.
Ellie: Is this what you wanted, mom? Have sex with both of us?
Sophia: Oh Ellie.. fuck! You're going to break me!
Ellie: That's what you deserve for being so naughty mom. Want me to stop?
Sophia: NO! Keep banging mom's butt!!
This is probably the most depraved scene one could ever imagine. Not even in her wildest dreams Sophia would've expected to be in the middle of a double incest, being fucked by her daughter and her son at the same time.
However Sam notices he's somehow being ignored and decides to make his move. He goes behind Ellie and starts fucking her ass.
Sam: Did you believe you're the only one who can do this?
Ellie: What are you doing Sam?
Ellie: Oh my.. Don't stop doing this!
Sam: Doing what?
Ellie: Keep fucking my ass!!!
From now on the four of them keep having fun in a regular way.