My friends and I rented out a beach house to spend the weekend with our wives/girlfriends. My friends girlfriend is shy and quite attractive. Everyone knows it and talks about it. Last night we were playing spades in the parlor and I noticed she wasn’t there. I asked my friend where his babe was, he said she’s probably on the phone in the room. She’s shy so I went to tell her to come out and socialize with us. I knocked and opened the door, she was naked in the shower. I could see her because it’s glass. My prick stood so I went to go and fuck my wife. I don’t even know if that’s cheating, now anytime I see her, I get an erection.