My sister came to stay

Late last year my only sister Vanesa 45 came to live with me. I'm Patty 50 and have 2 grown children who don't want anything to do with me since my divorce 4 years ago. I got myself a small rural block of 10 acres with a 3 bed cottage on it. Also a large steel shed/barn, I don't grow anything except vegetables in the house garden and have 3 horses and a dog from a animal refuge. The dog answers to Mutt and a few swear words also and I do ride the horses fairly regularly. Vanessa never married and has no children of her own and had a good business that failed due to the pandemic, couldn't open and even when she could she couldn't get stock to sell. It cost more to open the store for a week than she made in a month. So she shut down the business and came to live with her only sibling. Growing up we were like petrol and a lighted match, but as grew older and the passing of our parents. We calmed down quite a bit, after she rang I cleaned up a bedroom for her, the spare bedrooms weren't use and doors were kept closed and it was only dust and a few cobwebs and wash the bedding and remake it after. On her arrival she was happy to be away from the city and started riding the horses more than I did. She also took over the cooking, I didn't make my money by cooking. I have more than enough to keep me to life end, so I don't look for work and keep to myself. With Vanessa around me a great deal we started to ride together and also walk the tracks in the nearby national park. Mutt also walked with us, but doesn't like being on a lead when we are in the national park. On new years day we were sitting around by the fire and Vanessa asked what I wanted to do most of all in the new year. I was in a teasing mood and decided to see if I could get a rise out of her. I answered saying just find a woman and fuck her silly. Fully expecting Vanessa to be shocked, but she answered ditto except find a man for myself. I kept it going saying so you want fucking then, yes are you offering was her reply. If you want I answered, okay your bed than it's bigger she replied. I wasn't a 100% sure if she was having me on or not, but wasn't going to be the one to back down either. In my room I started to undress half expecting her to leave, but she totally undressed and got on my bed and so did I. After some awkward moments starting we finally fucked and then had a rest before fucking again. Vanessa moved into my room that evening and has been there ever since. We now have regular sex and act like a married couple and people think we're married also due to the same surnames. We don't tell them anything different either. Last month my daughter Caroline came for a quick visit as she wanted some help and she stayed 3 days. Caroline gets on with Vanessa better than with me and Vanessa used her old room while she was visiting. I was able to help Vanessa thru my old contacts and she left. She was hardly out the gate before Vanessa and me were fucking again and still are.