It's clear she already had sexual thoughts (that she acted out in solo) before she did the deed with the mc. But I guess DPC didn't want to immediately transform her into a cock gobbling goblin after one session with the mc, but it was kinda disappointing that she was still deadweight in their second round (or third round if you count the pre-STD test session).
In my experience (disclaimer: my virgin fucking statistics are limited to 2
), after a girl has had sex for the first time and gotten over their first time concerns, they are really excited to fuck a lot. I would have preferred if Jill was more obviously into it, but I guess after the mc discussed that with her at the end of ep9 things will start to evolve.
Way back I outlined two possible outcomes of her first time, both kinda missed the mark: