who's changing the subject?

Brian staggered into the house at two o'clock in the morning.
As he entered his bedroom, he found another man in bed withhis wife, Judy.Judy wife pushed the man off her and demanded to know where Brian had been until two o'clock in the morning.

Brian looked at his wife's lover and demanded, "Who the heck is this guy, and what is he doing in bed with you?"

Judy responded, "Don't go changing the subject! Where inthe heck have you been so late?"