My Gran discovered my secret

I'm Arnold 31 single and live in city and work mainly from since start of the pandemic and found I could my work from home. I'm no ladies man and use to hire hookers to get my sexual satisfaction. That was until my father's mother Norma 68 found out I used them, she had come to visit me and saw a lady leaving my apartment and she knew straight away why the lady had been visiting me. The lady was dressed to show assets you could say, Norma waited awhile before knocking on my door, I opened the door and was happy to see Norma, after she had entered and sat to talk with me She straight asked while had hired a hooker, knowing I was caught out. I told her I wasn't any good at meeting women and so I hired a woman every now and then. She added but you catch something really bad from them, I responded saying picking up a woman in a bar is worse as working girls get checked regularly. This I thought was the end of it, but I was wrong, Norma said I should meet nice girls. I said nice girl don't sleep with men like me, nonsense your not looking she added. I waited for her to tell me she was going to tell my parents, but she then said well if you want sex that badly I will provide it for you and you won't catch anything. This shocked me, I thought I had heard wrong at first. But as I didn't say anything she said it again, adding I'm your grandmother and want you to be happy and healthy. Norma is about 5'5" and slim and a widow, I started to mull it over and my cock decided it was great idea and went hard as rock. So I asked when would like to start, pointing to the bulge in my pants. Fully expecting to back down, now it looks like she replied and she got up took hold of my arm and lead me to my bed. She told me to take it easy as she hadn't had sex since granddad Paul passed away 3 years ago. I did as told and had sex with Norma. After which I showered with her and asked her to let me shave her pussy. After shaving her I went down on her and then fucked her again. When she was leaving she told me to call her anytime I wanted sex. I was very satisfied by having so much sex in a day and also had a feeling of guilt at fucking my grandma. The next 8 days I didn't hire a hooker and thought about my fucking of Norma. Then there was a knock on my door and it was Norma, she had come to see why I hadn't called her. I told I was thinking over what happened last time she visited. She asked was unhappy with the sex we had together, no I answered. I'm felt guilty about using you I replied. Well don't I was as willing as you were and also enjoyed getting fucked again she answered. I was still a quiet for a time. Norma stood up and started undressing, saying we might as well fuck as I'm here now. I undressed also and I shaved her pussy again we had sex several times with her staying the night with me. This went on for about another 3 weeks and then she said she should move in with me and it would save her travelling so much. So with in a week she was living me and I could get sex from her anytime I wanted and I wanted it a lot. She also started trying to find me a girlfriend, but as yet no luck. But great sex.