Why did Maia even bring up Jace when Isabelle asked her if she ever had her heart broken? I do agree that scene was awkward, and Isabelle coming out at Maia like that was so out of the left field and making assumptions. I only liked the mention of Jace though and Maia's smile, though it is never going to be canon.But it is almost as if Maia assumed Jace is that type of guy who would brag to everyone about the girls he slept with...
I actually thought it wasn’t random for Maia to bring it about.
Isabelle knows nothing about Maia. Absolutely nothing. Isabelle comes in and makes really big assumptions about Maia’s feelings, previous relationships, as well as her emotional and mental state. It would actually make sense for Maia to believe that Jace mentioned something to his sister in that context and thats why she’s acting as though she “knows” Maia. At least more sense then this random stranger sitting about preaching to her.