I think she’s going to give Nick some trouble late in the season, as set up by Renard asking her what she’d do if Nick hurt her mommy. I was hoping he’d talk to her this week about his mom, since she was saying how much she missed her. Make that connection in her mind, and he’s not just her mommy’s “not daddy.” Though, of course, Nick is her half-brother’s dad!
If she turns on anyone it will be Renard. I don't think she knows that he killed Meisner yet.
Meisner was her and mommy's first protector, Kelly was the second and Diana does not forget.