Hey! I'm pretty sure they'd know each other, depending on how involved he was, she might even call him "brother". She moved away at eighteen to sort of be wild and free without everyone watching her like a hawk and keeping her protected. If it's cool with Conor's writer, she would've been up his ass constantly, following him everywhere when they were kids/teenagers. Aside from just general hanging out and family gatherings, Brenna might be enlisting Cameron to help her perfect her shooting and maybe even her hand to hand. Being raised with three boys and all their friends, she's always known how to fight and been decent at it, though after ten years of nothing but ballet, she's going to need to reinforce it. Depending on how close they get through that, he might be the first person she'd tell about her plans.