I'd prefer that (not a fan of Cathrine) & it MIGHT explain why she was acting extra intense even for her with that whole thing at the hotel. As we know Brenna has major trust & abatement issues so the possibility of her being a single mother (at what 19/20? I'm not sure how old she is off the top of my head beyond College age) & by her brother no less (the source of those issues) may drive her to do drastic things to maintain some kind of stability in her life as to not go through what her mother went through.
Or I could be reading WAY too much into it & am talking out of my ass.
Or I could be reading WAY too much into it & am talking out of my ass.