I was out on my friends boat on a hot summers day, with him, his girlfriend and a couple of other mates, after boating around for most of the day with the occational stop off for a swim, my two other mates wanted to get off a go for a look around a water fall we found. I was happy to stay with the boat and guard it and its important cargo of Alcohol. The boat owner and his misses also go off and walked off but soon returned as the sandflies where biting her all over.
I was sitting up on the deck having a beer while they went below to get a drink, after a few minutes I had finished my drink and went below to get another, as i opened the little hatch i was greeted by her on her knees sucking his cock, we all jumped and I turned away while they got them selves together.
I went back to the front of the boat and sat down, I was soon joined by my mate, he said sorry etc, I just laughed it off.
Then out of no where he said do you want to have a quick 3some, I didn't know what to say.....so he said come on lets do it before the other get back.
I followed him below where his girlfriend was and she asked is he keen?......he nodded and she jumped up sat me on a seat and riped my pants off and started sucking my cock, my mate went behind here and started fucking her. After a few minutes we could hear the other guys coming back, she started going crazy on my cock and i blow my load in her mouth with she quickly swollowed, then i went upstairs to help the others onboard with they finished fucking.
Since then we have had a couple of 3somes and she keeps asking for more!