I too think that some proper sex is imminent. P in V either in the august- or the november-update. I wouldn't be surprised if mrdots feels the need to speed things up a bit and deliver already in august. Maybe, just maybe, F and D has a steamy nuru-massage session (as promised) and D slips while doing it front-to-front and ends up briefly impaling herself on his dick, and one thing leads to another.
Speaking of entering through the backdoor though, it's kind of weird to me that this is even on the radar right now, just as it felt weird when Jennifer offered to do anal in her scene. For me that comes much much later than vanilla PIV sex. Maybe it's because I'm from a secular country, where there's no religious taboo involved in losing your virginity. Perhaps girls in more religious countries are to a much higher degree seen as losing their purity once they have vaginal sex, and so they cheat by doing it in the butt. I genuniely can't tell if that's just a bad movie trope or if it actually happens that way, but it seems totally outlandish to me.
Either way, to me having sex with Elena and flashing her tits to a random stranger on the bus comes before anal sex for D in my mind. I'm looking forward to more exhibitionism and role play rather than anal.