Mother talking in her Sleep

I live in a 2-bed cottage with my mother Carol 42 divorced, my father Donald left her for his P A 3 years ago. I'm Evan 19 first year at university. Carol works at the university in the admin office, recently I was in bed reading stories on an erotic story web site. When I heard Carol mention my name and I went to see what she wanted, I entered her room and saw that she was asleep from the light in the hallway. I turned to leave and she again said my name, I turned back towards her but she was still asleep. But she started talking again and I realized she was talking in her sleep. She again started to talk and she was talking about sex and I was the person she was talking about. This was a shock at first to me, but I left her room to return to mine. On getting back to my room I had become aroused by her talking about me and had a hard-on. I then heard my name again and I removed my shorts and then returned to her room naked. As I approached her bed I stepped on a creaky board and Carol woke up. She was looking straight at my hard cock poking out towards her. She asked what was I doing in her room and I said I heard her call my name and I had come to see what she wanted. Then she had said that she wanted my hard cock in her and that I then returned to my room to think and on hearing my name again. I had removed my shorts and came back. She then said that she had a sexual dream and must have been talking in her sleep. I was feeling really awkward at the time and said I would go back to my bed. Stilling looking at my still hard cock and she said do you want me to help you with your arousal. I just look at her and nodded, then she took hold of my cock and started to stroke it. Shortly after she told me to join her in her bed. As I got in beside her she undressed and then she went back to stroking my cock and then going down on me. I told her I was about to cum and took it all in her mouth and then swallowed it. Then told me to help get her off and I did as instructed and after I had another hard-on she got me to fuck her. I've been sleeping with her ever since and she has taught me a lot.