I think guys do. I've fucked a wife in front of hubby and I love that he can see my pleasuring her. I always try to fuck her better than he can and make her cum harder.
I have fucked a wife in front of her husband, while he was masturbating watching me. It was at a party where the men put their car keys in a hat, and the women have to pull the keys out of the hat
I bet he loved that. She must have appreciated the audience. Did she speak or interact with him as you fucked her?
It was a shame when they moved away they were great next door neighbours. They had some real rave up parties