Do people need to be hand-held about what happened? It's pretty obvious, they spent a day together, she was horny, then he started masturbating in front of her which made her more horney, then he coaxed her into a hand job, which escalated from there. I mean he had already gotten thigh jobs in the shower and such, its not much of a stretch that he convinced her to do it again, then from there was able to get her to agree to sex. "This is the last time we hang out as you said, just 1 time? come on no one will know" Add in a cold rainy night where they lost power, "come close we can keep each other warm"
Oh well, more scenes won't hurt I guess. I just hope he doesn't get too bogged down trying to make everybody happy that we end up stalled out on progressing for too many updates.