Living with my Grandmother

Last November I got a new job in the same city as my Grandmother Karen 60 widow lived. So it was suggested I stay with Karen until I settled in the city, Karen is my father's Paul's mother and she had 3 children with Paul the eldest. I'm his eldest and at 20 was moving away from home for the first time. I'm also called Paul after my father and his late father and so I arrived at Karen's apartment a 2 bed 1 bath as she had downsized after her Paul's death. It would okay for a short time I thought on my arrival, but I really wanted my own place. I settled in and just went to work and straight home for the first few weeks. I'm not a ladies man, but I ain't shy or backward when it comes to women either. Just not successful all the time, I hadn't met any women I was interested in in that time. I decided to go to movie and went to a old movie being replayed at a cinema and asked Karen would she like to go with me. She accepted and we had a nice time out together and even having a drink at bar afterwards. So the next weekend we again went out and also had a good time. This time we had a extra drink or two after the movie then walking back home. I don't know whether it was the alcohol or the cold night air, we started to hold each other on the way home. On arriving home we removed our coats and started to cuddle and I then started to feel up Karen. She stopped me and stood up and to my great surprise removed her top and bra before sitting down beside me again. Taking it as a green light I proceeded to feel her up and then suck her breasts. She let me do it and when I moved my hand down to her panties, she suggested we go to her bed. Which we did and I fucked Karen twice that night and started sleeping her each night. We regularly have sex and she is also wants me to meet a girl my own age. But I haven't found one yet. Karen's friend Christine 65 divorced has been invited by Karen to join us in our sexual romps. Christine is very willing and I can do anything I want with her and have fucked her in her ass several times. But Karen isn't that willing yet, but I'm making progress and hope to crack her ass sometime soon.