Xanthippe's ensuing flustered giggle was only half for show.

... Actually, not even that. Because you couldn't really fake a blush, not even a faint one. "Yeah, let me show you my room," she said, her roommates now just about all forgotten. "It's, um, right this way."

Where 'right this way' seemed to be the door across the living room, as that was where she was now tugging him towards.