The answer was laughable, but the boy - and it was obvious that 'boy' was an appropriate name for him - seemed suspicious of him already so laughing probably wouldn't go over well. Not that Xavier particularly cared, but it got messy when people took umbrage with him.
"She told me, of course. Said you'd been set up on a date together," he said, seeing no reason to lie. "How else would I know?"
Smirking, he just leaned back and shrugged. "Any number of people, I'm sure."