Unless you know the language and can understand what was said between them, I do not feel anyone can make that kind of statement. Lilu has skype sessions with both Mark and Roma after they moved and sometimes for an hour out so obviously they have a few things in common with them and are friends with them. And both of them came to visit and they all go out together tonight.
I would say Roma and Sabina were or maybe still are in a relationship as they had sex every night when she was there and spent the most time together.