Returned home to Daddy

I'm Maureen 43 divorced with 1 grown child, after my divorce was final late last year I returned home to with my father David 60 widower and I'm his only daughter. My father lives on an acre just outside my old home town where I grew up with my 2 brothers. My mother also was called Maureen died six years ago of cancer after a long illness. My father is well off due to selling his businesses and retiring after my mother's death. He keeps to himself a lot and rarely leave town, spends his days gardening and visit my mother's grave. My son has his own life and sees me every now and then, has no time for his father who has moved to west coast. Once back home with David I took over the cooking and cleaning including doing the washing. David kept the house tidy, but some rooms were closed off and not entered for a long time. He was happy for me to stay and also gave me the space to sort out my life. Last February I walk in on him drying himself after a shower, he didn't see as he was drying his hair and face with the towel. I quickly left the bathroom and waited until he was finished and had also left the bathroom. I had been shocked by the sight of him naked and seeing his huge cock just hanging between his legs. It was at least 8 inches long on the slack or was in the process of going down after he had masturbated himself. I didn't think any man could have a cock that big and not be either getting hard or going down. I was determined to see it again and find out just how big it was. But I couldn't just him to drop his pants and show. But I didn't have to, David liked restoring old tractors and then selling them. He was in the process of doing up and old ford with had a crank handle, while trying to start it with the handle it suddenly caught and the tractor started and the handle got loose from his hand and hit him in the groin area. I saw it happen and rush over to help, it had hit hard enough to to put him down on the ground. I helped him up and wanted to call the doctor but he didn't want me too. He said it just winded him, I insisted on checking him over and took him back to the house and I had him drop his pants to inspect his groin area. I hadn't thought of checking his cock until after I had done the inspection. On seeing there was no real sign of injury, but he did have a large cock on the slack least over 6 inches maybe a bit more. I decided to push my luck and told I would need to test it. He looked at me and asked test how, I just started to stroke his cock and it responded by going hard and he said it works. I said I will need to get you off and see if any blood comes out. He was sure about me masturbating him, I kept going and finally got him off. No blood came out, he was in shock I think from having his daughter pull him off. I decided he needed to have a hot shower and if it causes any bruising to appear later on. So he had a shower and after dinner that night I checked him again. No signs of any bruising, but it could take days I told him I would keep checking for a couple more days. The next day I done as before and stroked his cock and decided to suck as well as masturbate him, he was shocked by my sucking him off. But also enjoyed it, that evening I got him to lay on his bed and I done checks and again got him hard. This time however I was so wet. I hadn't any panties on and so I mounted him and started to ride his monster cock. This also shocked him, but he didn't say anything and I came before he did and then laid beside him. Later on I finished undressing and stayed the night with him. In the morning I awoke just before he did and he already had a hard-on. So when he awoke I again mounted him and he also joined in the fucking this time. He never did get a bruise and we have kept fucking regularly since then.