"How do you know?" Gio asked, and though he didn't usually pout, he was sort of pouting. "Did you talk to her about it?" Did Rory even know who 'that other guy' was? "Did you talk to her while I went to the bathroom yesterday while she was here?" He didn't sound accusing, but his voice was definitely on edge. Gio should have known leaving Glory alone unguarded in the house would have been a bad idea, even if he wouldn't peg Rory as the one to harass Glory. Nico or their mom, maybe, but not Rory.
But, and a big but at that, if Rory had some confirmation that Glory had a connection with him, Gio wouldn't be angry. In fact, he was almost desperate to hear his brother had spoken to Glory about him.