My Aunt asked me to get her pregnant

My aunt Andrea 36 asked me to get her pregnant, I'm Nelson 24 going to a local university. Andrea is married Jordan 54 who the brother of my father Alan 56 and they fight like cats and dogs. Rarely talk to each other and both doing well in business, anyway Andrea wanted to start a family, but couldn't get pregnant. She collected a sample of Jordan's sperm and had it tested and it showed he was subpar on the breeding front. I'm the oldest male besides my father and Jordan. I'm the only direct male to Jordan thru my father and only male of Alan's 4 children. Andrea couldn't asked my father for assistance as he would make it public about Jordan not being able to father children due to their always fighting. I've always got on well with Andrea and seen her over my grandparents house regularly. Then one day she called and asked to meet somewhere out of the way to talk. I don't have a car and I had a half day at university and so Andrea picked me and we went for a drive to the local lookout. Rarely used during daylight, she asked me to promise to keep it secret and not mention it to anyone especially my father Alan. I agreed and she told me of her problem trying to have a baby and then asked would I be willing to provide her my sperm. I'm not the greatest with girls, but have had some success. I agreed and we made arrangement on where and when, on the chosen day she again picked me up and we went to a small town's motel outside of the city. There I started to jerk off, but I wasn't doing so great and Andrea took over jerking me off and stripping off her clothes as well. Still having trouble she decided we should just fuck and get it done. I think I was a little overcome by the whole thing, but I was able to cum inside her when I fucked her. After a rest I thought we would probably head back to the city. Andrea was happy to at least have sperm inside, but then decided we might as well fuck again to double the chances. I was more relaxed the second time enjoyed more than the first time. After a few weeks no positive test results, we done the whole thing over again, this time no jerking just fucking 3 times. We done it again the following weekend as well, then she got tested and the first test showed no pregnancy. But a few days later the second showed a possible positive and the third test a strong positive. Jordan and Andrea had a baby girl Kathleen who has just born and Jordan is talking about another and wants a boy. Andrea is agreeable when Kathleen turns 1 and looked at me when she agreed.