I enter the dining room with my partner and we are seated with 2 other couples.  An attractive woman is seated next to me. Over dinner we all share as much or little of our story as we are comfortable doing.  

The woman seated next to me is wearing a long dress, low cut with no bra and she is flirting and flashing her tits. When I notice and find my gaze constantly drawn to the show she is giving, I put my hand under the table and onto her thigh.  No one is aware of what we are doing so I ease her dress up until I feel bare flesh. Becoming bolder I allow my hand to move on up until I find her knickers. Her nipples are now rock hard and very prominent, her breathing increasing.

I rub her clit through her knickers until I can no longer resist slipping my fingers into her knickers to caress her excited clit and pussy  

 My partner excuses herself to visit the bathrooms and hers follows. We are really excited and I desperately attack her pussy to get her off. The other couple are now fully aware of our brazen activity and start to pleasure each other although more discreetly than us. 

For me the risk of getting caught cheating adds significantly to my excitement. We arrange to meet later in her cabin where she is a hot wife to her timid cuk