My Nephew David

I'm Maria 42 married to Troy 47 and 3 have 3 children the youngest is now at university interstate. Troy works away a great deal and no I'm alone and getting horny went Troy is away. Troy's brother Steven has 3 daughters and a son David 24 and he's a carpenter by trade. Steven lives and works in the next town, David works in our town and Troy hired him to had another bedroom and a bathroom onto our house. We only had 3 bedrooms one bathroom before and with a grown family Troy said we'll need more room at Christmas when they visit. So David will work on the extension on the weekends, he's is a very good carpenter. It was while he was working on the frame on a hot day shirtless, I started to take more notice of him. Then his boarding house was sold and he had to find another place to stay, Troy offered him a room with us. Troy told me David would be able to work more on the extension if he was living here. Anyway with all the framing done and the pipes installed for the bathroom. David roofed the extension finished the exterior walls and started on the interior. It was then one evening I thought he was still working on the extension and I walked into the bathroom and David was showering and had his hair all soaped up and eye closed. I saw his cock and it was just hanging between his legs and it was the biggest I've ever saw. I quickly left before he saw me and all I could think of was his huge cock. Troy came home shortly after and we all had dinner together, David told Troy to get the electrician in the run the power lines for lights and sockets and he'll finish the extension ready for painting the next weekend. Troy rang his friend who was the electrician and it was arranged to be done during the week. Troy was going away on Tuesday and would be gone till Saturday. David is quiet not shy, talks only when he has something to say. Tuesday he came home earlier than usual as there was an accident at work, no injury just a sealing compound plastic container had split and his clothes were cover in it. It wasn't harmful just sticky and washes out in water, I got him to remove his clothes and I put them into the laundry tub to soak and told him to shower. I got a little horny watching him walk away in his shorts. I'm not a backwards person and decided try my luck as they say. I stripped naked and entered the bathroom and joined him in the shower. He was shocked by my actions and I told him I was there give him a good wash down. I'm no centerfold model, but consider myself above average. Anyway David's cock thought I looked good by going rock hard, I started to play with it and got him to join me in my bed. He wasn't a virgin, but wasn't very active either and I think his huge cock was the reason it scared the girls who saw it. About 9 to 10 inches when erect and my hand couldn't grip totally around it. But I got a good fucking by him and had him join every night was away after that Tuesday. I can't get pregnant as I've had my tubes tied. I helping David get his rocks off and he's helping me be satisfied. I've also introduce him to Susan 22 our neighbors Daughter, Susan and her mother Rachel 40 widow run a little shop on the High street. I mentioned to Rachel that David was a nice quiet person who would be perfect for Susan. Susan is quiet like David talks only when she has something to say. That was October last year David still stays with us and is dating and fucking Susan and is to marry her in August. A condom broke recently and she has just tested positive to being pregnant, but he had proposed before that happen. I've seen Rachel walking a bit strange and asked David had he anything to do with it and he nodded yes. Susan was scared the first time she saw his big cock and ran to Rachel and Rachel acme to see what the fuss was about and it turned into a threesome. David will be moving in with them after the wedding, but I think I might still get a servicing now and then after that happens.