It was early morning on our small boat in a marina, where we arrived the evening before. Poked my gf with morning wood and she started giving me a hand job. We were both in our early 20s.

It was summer so it was already warm, and I had the hatch open for fresh air. We were at the end of the dock away from all other boats. Even this early she gave a great handy with long strokes. I paused her and squirt lube on the head of my cock and she lovingly continued.

I quietly thrust into her hand as she stroked harder sensing that I was going to cum. I pushed her hand and my cock down to aim at my T-shirt. I was in a trance as the spasm hit and the first stream of squirt across my shirt.

All of a sudden I heard a squeal, I opened my eyes and right above me looking down at my ejaculating cock was a shocked girl probably our age. She screamed "sorry!!" and was gone. Even though it happened in an instant I swear it intensified my orgasm.

I held my girls hand around my cock and thrust into it without any regard as to where the cum would go. I launched several streams before my gf pulled her hand away and stuck her head out the hatch. She reached out and came back down with a bill for the night's moorage fee that the girl left.

My gf was horrified leaving me to massage out the last of the cum and the lessening post-ejaculation spasms myself. We got cleaned up and my gf asked to go somewhere else as she was too embarrassed to see the marina girl on the dock. I agreed and said I'd pay the bill and hoped that someone else would be working in the marina office. Of course that was BS, it was such a turn on I really wanted to see the marina girl.

I walked to the office and to my delight, there she was, a tanned and cute brunette. She was the only one working and still getting set up for the day - she blushed when she saw me.

I apologized to her and she apologized too saying she doesn't like to knock and wake people up. She laughed when I said we were already up. 15 minutes earlier this girl actually saw me ejaculate and talking to her made me hard again.

I told her we were leaving, telling her my gf was too embarrassed to stay. She said to tell her it's ok and no big deal. Pushing it just a bit, I joked "that's probably the last one I get for a while!" Marina girl laughed and blushed again and wished me luck.

We left the marina and cruised out into some open water to drift and relax. I decided to get changed into my swim trunks and my gf glanced at my half hard cock. I told her I needed to cum again, and in a slightly annoyed voice she questioned why so soon. I said I didn't know and was just feeling horny. GF knew what was up, and told me I was on my own this time. I took that at face value and started calmly jerking off while she read her book while wearing shorts and my hoodie about 5 feet away.

I was so turned on from what happened earlier, my gf close by and by being nude outside on the water. I decided to get the lube again and gf looked right at my hard cock as it went by.

I sat back down and stroked with two hands. GF could tell I was getting close and put her book down. I walked to the side of the boat and she watched as spurt after spurt lurched out of my cock and into the water.

Whenever I took the boat out without my GF, I went to that marina.