My Wife wanted a Threesome

I'm Clark 32 married 3 children and run a small transport company. My wife Julia 31 is my dream girl, we have a great sex life. She had trouble with our last child birth and now cannot have another. That is no problem, but since she finished breast feeding her, she wants more sex. She always horny and she read somewhere that it meant she needed more from sex not just me and her. She wanted to try a threesome, with me and another women. She doesn't want another man, but who could we get. We live in a small minded town and we don't want a bad reputation. I said We could try the internet and find someone out of town and go away for a weekend and get her mother Sybil to look after the children. But after a week of searching Julia hadn't found anyone that interested her. While talking to her mother Sybil 54 widow and a good looking woman. Julia told her mother that she was getting horny a lot more and that we were looking to spice up our sex life a bit by a little threesome action. Julia was surprised that Sybil wasn't shocked at the idea of a threesome. Sybil said At least your getting fucked, I'm not and have play with myself. Julia got hot and horny hearing that and then asked Sybil would she like to join in a threesome with us. Sybil responded That she wouldn't mind, but what about Clark would he want to fuck his old mother in law. Julia said I ask him and let you know, on my arrival home after work. She got me alone and said She had the perfect partner for our threesome, she 54 open minded and we could stay home and the neighbors would suspect a thing. I was a okay with it and ask do I know her or is she someone new. I mainly wanted to make my wife happy, but would pass up a fuck. Julia responded That it was her mother Sybil and she was willing if I was. I was shocked and said You asked your mother to join us for sex. Yes and she is willing and horny, so how about you. I don't know it a bit of a shock I never thought about Sybil in a sexual way and she is a great looking woman. I think on it and tell later I said. Okay don't take too long she said. The next morning was Saturday and I went to my office for a couple of hours and returned home at lunchtime. Julia asked If I had made my mind up. I said I'll will, but it feels a bit strange at the moment. That's only to be expected, I'll make the arrangements with mom she said. Next I heard Sybil was coming to stay for a week or more depending on how our threesome worked out. Sybil arrived on Tuesday and when I got home that evening she met at the door and gave a hug and a kiss on the cheek and grabbing my cock thru my trousers. After the children were in bed and asleep. Julia and Sybil came into the bedroom and done a slow striptease and then we had sex. I was a bit awkward and they put it down to the first time nerves. We tried again the next night, I wasn't as bad as the first. But I needed to loosen up a bit more. Thursday morning Julia went to make breakfast and see to the children. Sybil stayed with me and kissed me and then went down on me and then see mounted me. She said I was a lot better now that I had fully accepted her as a sex partner. The threesome were great after that and Sybil for a few days to arrange to move her belonging. So she would be now living with us. She got back and I had made door joining her room to ours thru walk in closets. Julia is a lot happier and I'm get great sex from 2 great women.