Request by friend of the family

I'm 21 and last April a longtime friend of my mother and since my mother married my father a friend of the family as well. The friend 38 never married too focused on her career, finally realized her clock was ticking and she would miss out on becoming a mother. Two years younger than my mother and no close male friends who weren't married or gay, thought about IVF but dismissed it as too much hassle legally. Then at my mother's birthday party she saw me, and I became her focus of her interest in becoming a mother. I'm a nerd is the easiest way to describe me, don't date and do great at university. As my parents were going away on a second honeymoon the upcoming Friday, she asked me to see her on the weekend. I'd nothing else planned just studying, so I agreed and arrived at her apartment early like she had asked me too (8.30). She was straight the point, and I was shocked and excited in equal parts. But the chance of losing my virginity was too good to miss in the end, plus she promised to teach me about sex and pleasing girls. Striking while the iron was hot as they say we started that morning, and I stayed with her until Monday morning, she dropped me home on her way to her office, so I could get ready and go to my lectures. I went to her apartment after university, and we continued having sex, until my parents returned the following Saturday. My sister was staying at her friends and so nobody knew I wasn't home while they were away. Sex continued even after she got pregnant, mainly her teaching me to be better. Telling my mother, she was pregnant by an old friend, who was otherwise committed. Which my mother took to be already married and so didn't press the issue further. Having known me all my life, does make me an old friend you could say. Sex hasn't yet stopped but will stop shortly she has said. But I've grown in confidence since starting our sexual relationship and have asked several girls out, only one accepted and we've had 2 dates so far.