I want to add a note/information to that. Of course that is a bad thing to do in general. But please have in mind that her husband is always away and specially under alcohol you could get the idea that your partner might be cheating. And being totally drunk she projected all this on Ava and MC.
Just a small push to maybe understand better what she is doing.

The flirting and all with MC is something that goes on for many years already. But it just got more intense after her husband went always away.