If she's her sister-in-law, that means that after confessing her love for blondie, she went on to marry blondie's brother??? This bih nastyyy, I already don't like her.
I think that what we're seeing is just the past from Adam's POV, that's why those weird scenes where he seems to be under interrogation. I have a feeling that something really bad happened with eve and we're getting there through flashbacks. ╥﹏╥
I need her so bad, I'm actually shaking from jealousy