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.