It was very erotic, and I think of it often.

My wife and I have been married for 15 years and celebrated our anniversary by taking a cruise to the Bahamas. In the port of call that was an overnight stay, my wife and I set out to find a beach so that we could wade in the Bahamian water. We were in our swim suits, and my wife had on a cover up, so of course we didn't have on underwear. We sneaked through a hotel lobby to their private pool and beach area. I was so turned on by seeing her in her swim suit, and excited about being alone on a dark beach with her. We started kissing and decided to go back up the beach to the where there were lounge chairs. I turned one of the chairs around to face the hotel and she sat facing the water and I sat facing the hotel. I slid my hand up her thigh, and slid her suit out of the way until I could slip my fingers in her very wet kitty. Her hand slid up my inner thigh until she had taken my hard rock cock in her hand. She was so wet and open that I could nearly put my whole hand in her. I reached her spot inside and positioned my thumb on her clit, while she pumped me until both of us came to a great orgasm. It was very erotic and I think of it often.