Sister in law

Happy married, ** life great, my wife can be very dirty, in the past she has liked me shouting her friends names when I've ** her.
We went to Spain with her family to a villa which had a pool, all sat around it one afternoon I kept trying to get a good look at her sisters larger **.
My wife caught me and said she wanted a word with me, I thought I was in trouble but no she let me ** her while she talked about her sister and I got to shout her sister name when I came.
Over the next 3 years I would ** my wife while telling her how hot her sister is and one day I will ** her and she could ** my ** clean.
Well at a wedding a few weeks back that is what happed my wife went to bed early and I was left with her sister a flirted a bit and ended up ** her.
She kept saying she couldn't believe it happened and she did not know how to face her sister in the morning but told her not to worry about it. I left going to my wife who was waiting for me, she said about time, I want you but I told her no ** just ** sucking tonight when I came in her mouth she said i teasted different I told her that was because her sister's ** was all over my ** and that it had finally happened. Giving her a peck on the forehead told her the next in will be her mother!