This review may contain spoilers. I can handle the truth.
The sex felt authentic, and the motivations were understandable (as 'understandable' as this could ever possibly get, anyway!)
I liked how it showed that she did have a moral compass, it just wasn't always directed towards her own family...
I think I missed how Lina found out, though? (Forgive me - I'm currently dealing with Covid symptoms, so my concentration isn't as sharp as usual! Did she find the tapes?)
EDIT - Never mind; Wikipedia tells me that she saw them together, which I must have missed!