Living with Grandma

I'm Rob short for Robert 25 and work at the local power station. I have a 3 bed 1 bath house I purchased 2 years ago in a very run down condition. Over the time since I've done it up and I've been living and have been living here for just over 18 months. Last year in June my nan's apartment building had a fire and she needed another place to live. So she moved in with me as I'm the family living nearby. Pamela 67 widow is a quiet woman by nature a little overweight and 5 foot 6 inches tall. She spends her time knitting and watching TV. So she didn't get in my way and with the lockdown she didn't get out much at all. I still had to go to work and would get anything we needed. I took Pamela to her doctors once a month. Then just after thanksgiving I was having a soak in the bath after working under house and started playing with myself. I hadn't locked the door and Pamela walked in on me. After an awkward silence and seeing her looking straight at my hard cock, I asked her would she like to stroke my cock for me. I saw the a shock look appear on her face and was about say just joking, when she said okay. It my my turn to be a little shocked, but never been one to back down I let her start the stroking of my cock. It was a little awkward with her having kneel beside the bathtub and I suggested we go to my bedroom and finish it there. After drying myself we headed to my bed and I laid down and she started to stroke my cock again. With her standing beside my bed I started to run my hand over her body and then put it under her dress and started to rub her vagina. I then started to put my hand into her pants and finger her. After she got really wet, I asked would she let me fuck her and she answered yes. She undressed completely and we were soon fucking and I drained my balls twice into her that afternoon. Since then I've asked her for sex regularly and she lets me fuck almost every time. We regularly share the same bed, but not always fucking.