If they sleep apart they are not tempted to have sex in this house in front of the camera. Wonder where they do have sex..
Yes, they sleep apart, but Igor see and touch her naked ! IIn't it a temptation? And after he goes to sleep how nothing happened! A guy of his age that haven't a girlfriend of sure he jerck off at last one a day ! Moreover why it can be excluded that they have sex outside? May be they are only good friends and they are in love with other people! Or they can have sex in their car, why not ? And how can be ruled out that, if they are a real couple, they have some good friend that borrow them a room where they can have sex?
There are lots of possibilities, but for certain a young guy cannot lives without any form of sex! It's umanity impossibile!