Ava part:
Yes I will show their past. But obvious no sex scenes. Just implied.
MC part:
I already mentioned in one of the comments that MC will not watch the cheating/ntr whatever scenes while jerking of to it. Or even be happy about it. So at beginning it will be mystery for both, MC and the player. I am not sure yet if later the player will see it directly like I did with some pictures where you could see under blanket. Or if it stays mystery until MC can see it.
I think both have its positiv and negativ points. Maybe that is something the community should decide.