Yeah. I don't think Lisa is far enough along in her "relationship" with Max to have vaginal sex with him yet, let alone on camera. I could see the sex part happening soon, but not in time for the movie. I suspect the next update will involve having anal sex with Lisa while she's cuffed, and sex will be saved for a later update. At some point, I'm sure she'll be worked into the movie though. It's fairly certain Alice will be in a movie in the next update. I suspect sex with Ann is still a ways off. This next update may be the one where we get to fuck Alice's ass though, either on camera or as part of a punishment. There may be some play between Alice and Ann on camera though, which may spillover into real-life. I'm just making educated guesses on all of this though.
Edit: Also, hopefully blowjobs around the house now from Ann, as escalation of the handjobs. Maybe she starts complaining of "carpal tunnel syndrome" from jerking Max off all of the time, and uses her mouth instead. Also, maybe Max convinces Alice that she needs to audition/rehearse for their upcoming porn movie. Maybe he can even give her ideas to improvise off of before sex starts. It could be the same set of pictures, but different dialogue from Alice, from loving sister to blackmail and other kinks. I think that could be fun. Although now I've gone more from "predictions" to "wish list".