Mother Alice

My mother Alice 39 and I'm Glen 21 her only child, my father Ted left us when I was 12 and has never tried to contact us or even me since. Alice's family are quite well off and Ted departure wasn't a problem money wise. Last April Alice suddenly got into my bed and wanted sex, telling me if I loved I would fuck her. Alice is average like myself and I really love my mother. She had started getting treatment for a problem with her Thyroid and has had really low self esteem since Ted cleared out. So not wanting to rejected her, I fucked hoping to satisfy her. I think I managed to satisfy her that night after 3 fucks, but in the morning she want more sex. Since then she joins me for sex almost every night in her bed, having gotten me to move into her bed instead of my smaller bed. I really enjoy the sex with her, but was a little confused by her suddenly want sex and especially with me. As I have the same doctor as Alice, I asked why was she so agitated lately. I was told it could be related to her thyroid problem, but I didn't say anything about her wanting sex. So I went online and looked up problems women get from Thyroid problems, nothing stood out straight away. So I added the word sexual to the search and HSDD came up as a result due Thyroid problems. Hypoactive Sexual Desire Disorder an so I looked it up and Thyroid problems were mentioned as well as low self esteem. Which as far as I was concerned matched what Alice was doing, we still fucked regularly and at the end of July. Alice was pregnant and her sex drive lowered a little bit. She still lets me fuck her and I've also started dating Roseanne 20 at the same university as me and Alice bought me a double bed for my room. Alice help me christen the bed sexually for the first week, but she give me space when I bring Roseanne home. But wants fucking when we're alone. I haven't told our doctor about her wanting sex from me and think once her thyroid is fixed and her self esteem improves, she would probably stop wanting to fuck me. I'm in no hurry to stop our sexual relationship.