My first officer, Steve, has a sister, Pauline, who was sailing as a passenger on this cruise which included putting in at ports on the Mediterranean. We ran into a nasty storm and she suffered badly from sea sickness and was treated in the ship's small hospital. I visited her there a few times until she had recovered. When the storm had passed she came to my cabin to thank me for my visits.
The sea was fairly calm and I put in to Barcelona to allow the passengers a few days for sight seeing. I know of a sandy beach a few miles from the port and, leaving Sreve in charge, I hired a car and took Pauline there so that we could swim in the warm sea. When there and in our swimming costumes I saw what a wonderful figure Pauline had. Having been a widower for so long, I was interested and my cock grew fairly hard. Pauline noticed it and said that I seemed somewhat affected on seeing her in her bathers. I said that I was and apologised. She replied that she didn't mind at all.
When we were in the water, she suggester that I might take off my bathers to relieve any discomfort I might be having.
"If did that I would be naked, Pauline".
"Yes, but I would like to see your hard-on if you don't mind."
"I wont mind, Pauline. No lady has seen me naked since I became a widower. I rather like the idea so Ill do it."
I pulled off my bathers and stood, stark naked, for her to see me. Pauline could now see my erection in the clear sea.
"Not bad Phil" she said. "I'd like to hold it as it is some weeks since I held my husband's in our house at home. May I?"
"Certainly you may. I'll stand here for you to hold it. There is nobody near us so it will be safe for you to hold it."
She walked to me and held my hard-on quite firmly. Of course it had quite an effect and my cock grew even harder.
"That's quite good, Pauline. I love it but I'd like it even more if you stroked it."
"Does that mean you want me to masturbate you Phil?"
"Yes, very much, if you would."
"If I do, would you like me to make you cum?"
"Yes.