If you have been following you would know that Lilu did have sex! she did it with Roma a couple weeks ago two nights in a row. In the shower and on Roma and Sabina bed. Even then Mark was all over her when Roma was out of the room he has zero respect for Lilu. She had to keep telling him no and pushing him away.
Actully that was on Roma birthday and everybody was all over each other even the other girl that was at the party.