For the "unexpected" scene in the next update, I think it has to be an Ian scene since the update centers around him. We also shouldn't expect solo scenes with characters he has already had scenes with since those aren't unexpected. So either it's a solo scene with a new character or it's a threesome scene.
Possible solo Ian scene:
-ivy ( i know this is the most wanted option on here)
-jess (good or bad)
-Nat
-Louise (she didn't get enough after the threesome)
Possible threesome scenes:
-holly and Lena (I doubt, probably save for the beach update)
-emma and Lena (more likely, but also seems like it would happen at the beach)
-ivy and Lena ( this one is actually more likely than the first two since there isn't anything saying ivy will be at the beach
-alison and Emma (Alison knows Ian sleeps with Emma and she crazy about him)
I wouldn't think any of your single-scene options as unexpected really. Maybe Nat because Eva seems to have implied she's not actually meant to be a sexual option, but then that'd just be her going back on her word.
The threesome options I'd only consider Alison/Emma threesome unexpected simply because of how Alison reacts if Ian goes for Emma in the first place. Lena with Ian and any of Holly or Ivy would be rather expected tbh and Emma/Lena threesome seems more likely since Lena can be sexual towards Emma by now.
Something really unexpected with Ian would perhaps be a Wade/Cindy threesome of some sort. Wouldn't be completely outlandish for the deliberate cheating route or the trying to keep them together route, but it would be rather out of the blue. Would be kinda interesting if the "reward" for playing Wade's friend would be a backdoor towards getting a scene or two with him and Cindy consensually.
Other than that or other more wacky threesome suggestions I don't really see what would constitute as "unexpected" Ian can already get with all the girls minus Ivy, who Eva has promised would get an Ian scene eventually.
Unless the unexpected scene of course doesn't involve Ian. Not sure how he'd come across such a scene though. Axel/Cindy wouldn't be unexpected, neither would Perry/Emma or even Axel or Perry with Cherry, not entirely unexpected at least even if it'd be rather sudden.
