As a nice surprise for my wife's birthday her brother decided to come up to see her, he lives in London. He decided to bring his girlfriend Kirsty with him who I remember from the last time he visited how good looking she was, long blonde hair, slim figure and nice firm tits (she is a dancer in a nightclub in London). So meanwhile at my wife's party we were all getting on well and having a good time when Kirsty decided she wanted to see how big our garden was, but I realised by the look in her eye that the garden wasn't the only thing she wanted to see. I opened our back door and she sat at the bottom of our garden on a bench. When I turned to face her she started rubbing my cock through my trousers and teasing and asking why am I so hard and I replied that I am always horny especially when alone with her she was wearing tight white vest top and short denim skirt, she then unzipped my trousers and my cock fell out of the opening and she started sucking really quickly on my cock and she was wanking me into her mouth with her other hand. It was the quickest I think I have ever cum and within 2 minutes I had emptied my balls right down her throat. By which time I heard the backdoor shut and we still don't know if her boyfriend seen us but she said next time they come to our house that it is my turn to pleasure her, and I think they are staying with us at the end of February so Im looking forward to it.