Just a short story proposal wherein you are a young man living at home and your younger sister is having some friends over for a slumber party, and the parents are going out.
All of her friends are curious, which one can you seduce?

+1 for this, sounds interesting

I second this!

I'd also really like to see this. I'd like to see a lot of things, and stories are always a fun thing to think about. In the chat, you could specify who you're talking to by centering your screen on a specific character or by using their name. For example, using current names; "Tiffany are you thirsty?", or "Sam/Samantha are you hungry?"

Maybe open it up for a threesome if you perform the tasks and chats correctly. Whilst having sex, you could even get specific on which girl you want in what position. Tell Tiffany to lie down and tell Samantha to get on top and make out with her. Then you can come in from behind. Of course, we might have to make a small list of positions if we were to add such a thing.

But a slumberparty setting could work well with this. I know much of this could be difficult to implement but a man can dream.

Would love to see this fantasy be made!

Or a different spin. You are trying to be a good brother but the girls have a bet going on who could seduce you before the night is over.

young man living at home and your younger sister is having some friends over for a slumber party
I like that

Can't wait to see this be made

Edit:
What does "younger sister" mean to you? In official version this would mean 18 or 21 with the protagonist being somewhere around his mid-twenties. But because this story will most likely be modded, it can also mean an age of 12.

I first read this thread this morning and sometime this day I got the idea, that we (the players) should be given the choice to either properly deliver the drink to the thirsty girl or "accidently" spill the glass on her

I would totally love to have the "sneak in" scenario, having to sneak into the bedroom and do them while sleeping and after you finish, you try to get out of the bedroom before the girls wake up, it be game over if the girls saw you or at least if the girls see you clearly enough but if they saw you as a shadow you won't fail or at least close to one unless something unexpected happen, then you be having a total orgy or threesome or whatever comes up.