great, then second aunty could arrive at the scene the same time as granny, could be a fairly interesting mix-up there

have you some loosey plan of how many updates are planned, or how long story should be?
perhaps it would be a good idea, to not make all women easily fuckable, yet to make it more hunt-catch-get game?
if that is a survival theme (?), there should be a few tertiary characters as well...I would introduce the first fuck with one of those characters, and then use it as a lust-enhancer for the most lustful main girl (the first aunty, though a cliche)...

it could be quite interesting game, if not pushed to quick "fuck em all, and finish the game" project imo.
tense build-up, a bit of drama, fear of losing, teasing (damn, now i think of that wthi Elaine-bitch

) usually is a good thing to have.