Wrong Impression

Short version.
Last April I 22 was on my way home and a lady I knew barely asked me for some help. I agreed and helped her shift some furniture, as I was leaving her home my mother saw me leaving as the house is three houses down from ours across the street. I didn't know the woman I'd helped had a bad reputation locally. My mother assumed wrongly I'd been having sex with the lady across the street. When in fact, I'd helped her rearrange furniture for an open house as she was selling her house and moving away. My father is away a great deal, and my older sister has married and now lives in the next suburb. So, it's just me and my mother 48 mostly, as my father is home about one week in 4. My mother not wanting me to see the lady of ill repute across the street. Decided to take action herself, not wanting to push me further into her arms she decided to replace her and keep it inhouse as they say. So, she visited me in my bed on the Friday night and we became lovers. No mention of the lady across the street, three nights a week except when my father was home. About three months after it had all started, the lady's house sold and she left. My mother mentioned that she had gone, and I said I knew she was going because I'd helped her shift furniture for an open house. My mother suddenly realized her assumption had been totally wrong and she'd started a sexual relationship with me because of that assumption. It came out over the next week why my mother had started having sex with me, I was a little shocked at first. But thought it was the best thing ever to happen to me and told her so. My own dating history was patchy at best, had improve after starting the sexual relationship with my mother and gaining confidence. At first, I was slightly afraid the sex would stop, but my mother had trained me too well. She was being well satisfied by me and decided to continue as I was quite happy with our sexual relationship. Only change happened last month, my father asked her for a divorce as he'd found someone else. He was somewhat surprised that my mother took it so well, an agreement has been reached and the divorce is proceeding. I now sleep with my mother every night, she actually seems happier now than before the divorce started, I think there was fiction in their marriage long before the divorce, but they had kept it hidden.