A grin slowly blossomed on the young man's face, revealing a canine, and he gave a rather breathy little laugh that sounded almost like a sigh of relief. He'd been worried about assuming the wrong things since walking in on Tony and his sister, but evidently Tony bounced around between people as much as the twins did, they were well suited to each other.
His fingers graze along Tony's belt. "...So how set on lunch were you?" he mumbled teasingly.