During a very drunken night in which my father in law stayed over, I found myself waking up naked next to him. John was behind me on the couch and it was the act of him sliding his cock into my ass that woke me. I've always loved anal sex, but my husband Gary rarely likes doing it, so feeling what I thought was Gary's cock fucking me up my ass from behind, I began to back onto him. Still relatively drunk, I went with the flow of our sexual act and was orgasming only a couple minutes later. That's when I heard John speak for the first time as he asked me if he could cum up my asshole. Very disorientated and not fully recognising the situation I was in, I mummbled "Fuck yeah". It was at that precise point I looked up and over to the door opening to our lounge and saw Gary standing there. He watched his own father fill my asshole with his cum. Then strangely I watched my own husband smile, turn around and walk into the kitchen. Sat on the edge of the sofa dressed in a bathrobe, Gary brought me a drink of coffee as John climbed the stairs to take a shower. Sitting down next to me Gary said "Thank you honey, you know what you did for my father means a lot". He looked at me and then holding my hand he added "Dad will be leaving tomorrow night, please make sure he doesn't go without you taking care of him again".

Sitting on my own later that day, I went over what I could remember from the night before and gradually it all came back to me. Gary asking me to fulfill his fathers wish to have sex possibly one more time. Remembering seeing Gary walk away as I took his fathers cock into my mouth and finally remembering how much I'd enjoyed being fucked time and time again, by a man more than twice my age.

The results that came back from Johns tests were thankfully negative. The symtoms he was feeling and at first diagnosed incorrectly weren't life threatening. So ten months on, John's still with us and each time he visits now, Gary makes himself scarce and I get all the anal sex I can handle, plus all the sexual know how of a man in his sixties. It's a family I love being a part of.