One of worst problems is having too many characters. I will never understand if you are making game with 3 female characters in house and he keep adding more....
I mean make it interesting, try to hook up with sara without anyone knowing, not after 10min into game shes striping... at same time go for mother, then scary part you got some options to get caught by someone in house but at same time when you try to hookup with sara she starts dating someone, make pact with that guy, you will help him but he also needs to help you, like you are sharing her with that guy.
You later want to get rid of that guy? Spend more time with sara or tell mother to check sara at X time, so she gets caught with her bf.
Make dad go for older sister...
Make mother pregnant, but no1 will know its your child etc...
Option: Go to town for a drink, alone or with someone from house, make option to invite them male or female in house, so you can get them to hook up with you or someone from your family... (and this is limited, not to invite 1000 new characters in house), example, max of 2 characters, if you sabotage only 1 of that character his/her plan with someone (guy dating your sister, dad is having affair with some girl, you hookup with some girl, you can go to town and meet another character.
Also, even if you didnt get rid 1 of 2 or both these characters you can continue going to town for a drink or disco with characters you know but you wont meet new ones.
Just this scenario keeps you really interested in game and you will never know what is going to happen, but game like this, after 1 hour into game and you already know what is going to happen.
So you always have you+4 characters in house + additional 2.
Also drop stupid secret card game, this isnt some detective game also drop mini games.