Original Commentary

Robert is just playing along with Jane in panel two- he has no idea what she's talking about, but sometimes it's easier to just agree with Jane than argue with her. originally Jane mentioned the word "naked" in panel five, but even I thought that visual would burn brain cells... dang, there they go anyway. -Isabel

Modern Commentary
Yeah, if Robert were planning a wild night that would've been a good time to come clean and tell Jane about it.

Except, well, you've met Robert - Terrence