Shock Horror

Last Christmas I was home from university for the holiday and it was also a family Christmas for the extended family. With my sister and her family as well as our parents and our brother and his family finally grandma Rachel 63 widow. So we had a house full and Rachel was to share my room with me. Which had a double bed in it, my parents old bed when they got a king size was installed in my room. Sharing a bed with your grandmother wasn't on my Christmas to do list. I'm Simon 21 and youngest of 3 single and not in any relationship the time. Rachel is 5'4" slender and fairly good looking for her age and widow of 6 years. She always been nice as far as I know and she lives in the same town as the university I attend. Not that I saw her much as she is fairy busy in social work activities. It felt awkward sharing a bed with your grandmother, but it was that or sleep on the floor. The first night I awoke had to pee and returned to bed only awake again an hour or so later with a hard-on. I would just masturbate myself usually, but had to return to the bathroom as Rachel in the bed with me. Second night I again awoke with another hard-on and it was sticking out of my PJ's and as I was getting out of the bed Rachel awoke turned on the light and saw my boner. I felt so shocked that she had caught with a hard-on. She what I was doing and I said going to the bathroom, stay here and lay back down and I'll take care of your problem for you. I done as asked and then she asked me to lift my hips off the bed and after I did she removed my PJ bottoms. She started to stroke my hard-on and it felt great, then she started to suck my cock and she got it right into her mouth. I felt my cum rising and told her nd just kept sucking, till came inside her mouth and she swallowed straight down. I was bit horrified my gran would suck me off and swallow it, but only for short time. She then removed her PJ bottoms and told me to go down on her. I did as told and under her directions got her off. Getting her off excited me and I got another hard-on and she saw it and saw me looking at her pussy. She then said alright you can ride if you want, I wanted too and did ride and we went back to sleep no pants and cuddling. In the morning it was like a normal morning you wouldn't know anything had happen. That night I was laying in bed thinking about the night before and got another hard-on and so I cuddled up to Rachel and she felt my hard cock poking her in the back. So we fucked again and I awoke early in the morning and was going to shower, Rachel awoke and so we fucked again. Showering together before the rest of the awoke. During my stay at home I fucked Rachel almost every night we were together. On returning to university, I decided to visit her as much as I could. But I rang first to make sure she would home first, I wasn't sure if she would want to still let me fuck her. I turned up at her apartment and she welcomed me and once inside she opened her coat to show me she was naked and she was ready for sex. I've regularly fucking her since and when my father said I might need to get an extra job to help pay my way. Rachel said I could move in with her and not at the university where I had to pay. He agreed I stay with Rachel as she had 2 rooms and that's how it is now. But we're only using 1 room hers. I don't get a fuck every night, but I get at least 1 a week. If I miss a week she lets me fuck her twice the next week, I stay at her apartment even when she away visiting relatives. I've cracked onto Adelaide 56 divorced who live in the same building as Rachel. She a little bigger body wise Rachel and gets drunks on weekends and she lets me fuck her then. Rachel is usually do her social work and when she out I visit Adelaide. She doesn't rink during the week, only on weekends. Rachel is the better fuck, Adelaide smells of alcohol and smoking.