@MotherofKitties
I can't see how she can be upset at him just talking to Mary unless he's made a comment about thinking Mary is attractive/his type 'on paper' or something of that ilk... but if he has... it could get interesting
I think it's slowly creeping up on Lib that Jake isn't who she thinks he is.
Going back to the start, he told her that if a blonde came into the villa that was his type, he would want to get to know her. More recently, she seen that video where he's telling boys he's not that attracted to Lib. That's been compounded by his inability to reassure her that he finds her attractive.
I'm not surprised she's feeling insecure and wary of him having close 1-2-1 chats with the blonde and perky Mary. Plus I wouldn't trust Mary any further than I could throw her.