Oh yah, we were in a hotel room with another couple and somehow the other woman ended up in my bed, I think by design. My wife got frisky in the middle of the night which she never does and we had a quiet fuck. I heard the other couple fucking a short time later when I heard my wife snoring. In the morning I woke up to morning wood and was in the middle of the repeat fuck when I realized as I was feeling her tits they were small. Too small the cunt I was fucking was really wet and open, not tight and dry. I whispered oops as I blew my load because I didn't have a rubber on. I truly has a surprised look on me face and turned beat red. The others were laughing at my reaction. My wife was laughing at my boner and didn't realize I was done fucking.