"She'd be really hurt, if you didn't tell her and it came out later that I knew," Nina told him, because it was true. "Vette might not say when she's hurt, but she would be."

So... going off and getting distracted and forgetting or... whatever, well, that might still happen. Nina wasn't going to make him talk to Vette, not about something like this.

But if he didn't tell her then, at least, she'd warned him.

"Vette's used to people leaving her," she added, more quietly. "Don't leave her like that, Prompto."