Body Clock Ticking

Two years ago my mother Joyce 45 divorced and my aunt Jennifer 39 were talking amongst themselves a great deal. Jennifer is married to Ronald 41 (Joyce's only Sibling) and Jennifer and Ronald had been married for about a decade and hadn't had any children of their own. I'm Andrew 24 only child and as I found out, only other male in Joyce's family line. The first thing I knew about their secret talks was when I was asked straight out by Joyce about fathering Jennifer's child. Shocked is a term that seems a little understated, but shocked, stunned whatever will have to do. Long story short Jennifer had collect a sperm sample from Ronald and had it tested and it came back as woeful for their chances of having children. Joyce and Jennifer have always been as thick as thieves as they say and it was Joyce who suggested getting a test done. Too muck alcohol and drugs at university was the problem according to Joyce. Ronald stopped drinking hard and using drug after university, but it looks like the damage was already done. Their next idea was for me to donate sperm to get Jennifer pregnant, but there was legal problems that included Ronald knowing and agreeing. Not likely to agree as he is very stubborn person. Glass jar was also passed over, no reason given. Direct insertion was chosen as the best way they decided on before they asked me to donate my services as could say. I was stunned and unsure, but Joyce always has ways to get me to do what she wants. So Jennifer waited until Ronald went away on a business trip and had sex with him before he left. She then stayed with us and fucked me as much as she could during her stay. I could say it was great sex with my aunt, but I felt like a lab rat with Joyce watching our sex sessions. When Jennifer left to return home, she said we would try again if this time didn't work. Joyce was quiet for a couple of days and then one night I was in bed and about to go to sleep. She came in got naked and joined me in my bed, at first I was stunned at least. But recovered and asked why she was in my bed naked, I did have a pretty good idea. She said she had decided to keep me filled up with new sperm incase Jennifer needed more servicing. By draining me regularly I would make more sperm and they would fresher than if I didn't have regular sex. It made sense in a weird way, but I did as she wanted and after that night I started sleeping with and fucking her regularly. After a month and no result in the test, Jennifer again came to stay while Ronald was away on business. While Jennifer was staying with us I only fucked her, on her returning home. I was back to fucking Joyce and I fully admit I had enjoyed the sex with Jennifer more the second time than the first. I always have enjoyed fucking Joyce since that first time. Jennifer got pregnant from the second attempt and both Ronald and her were very happy. But she still came over to visit when Ronald was out of town and had me fuck her. They had a daughter (early 2020) they called Maria after my late grandmother, that made Joyce very happy. Joyce continues to drain my balls and Jennifer is pregnant again with a boy this time, Both her and Ronald are happy with her pregnancy and I'm also happy to provide as much sperm as Jennifer wants. I love the personal delivery method we use.