Bex had absolutely no idea that Zoe had made out with Gavin--or at the very least kissed him--when Zoe had gone over to see him. Had she known, she would've figured he was off-limits, at least until Zoe's crush phase disappeared, but she didn't, so. With her twin's blessing, she bounced down into the common room, surprised to find it so empty.
"What'd you do, scare everyone away?" she said cheerfully, plopping down on the sofa beside him. "Threaten them with jinxes? Very suave." She peered down at what he was doing. "Homework? Maybe I ought to leave you to it."
Teasing, of course. But Gavin was an easy target sometimes.