Bri's pouting and sense of being kept in the dark is both understandable and indicative of her youth. It's worth giving Jay credit; she's doing everything she can to give Bri the opportunity to be a teenager without terrifying adult worries and responsibilities. She keeps things from her for this reason, but this also makes Bri feel like Jay doesn't trust her and thinks of her as a small, immature child when what Bri wants is to be treated like an intelligent young adult, capable of processing difficult things like this.