Making Babies

I'm lucky as I'm the youngest of 8 children, I didn't complete high school and just became a plumber. I have 4 brothers & 3 sisters all done well at school and university, so you could say I let the family down. But our ages range from 48 down to me 31, my oldest sibling (brother) married later than the others to a younger woman 11years his junior. Too busy making money I think, anyway she couldn't get pregnant. She got herself tested and there were no problems with her, so it must be him. Good luck trying to get him tested, she started getting worried she might not have children. Then at a family get together, she suddenly took interest in me. Which wasn't normal for her, she suddenly wanted to talk to me and even got my cellphone number. I would find out later my brother was getting annoyed at her not getting pregnant and they have a prenup. Well, my brother is a lawyer, also she likes her life and didn't want to lose it. So, she decided maybe I could get her pregnant. She asked me several days later about getting her pregnant and told me of her view my brother couldn't do the job. But she first insisted I tested to make sure I could do the job. I was okay by it would be great to have a child as my own love life was not doing well at the time. At first, she wanted it by a clinic and after seeing all the forms that were required changed her mind. Backup plan straight sex, which I loved the idea of. She said get on do the job get off, not very romantic I thought. But I agreed and she done the usual sex with him and after he went to play golf, she came to me, I done the job. This we done 4 times before she got pregnant and no sex since, last time was in March and she was confirmed in late April. My brother is very happy and so is she, baby is due late December, early January.