I don't think I am, but my family seem to take a very different view of it and I don't understand why.
Basically I had my gorgeous DS when I was 18, he was a surprise, me and his dad didn't last which wasn't surprising, but we co parent and remain pretty friendly, he has DS one day a week and his parents have DS for tea once a week and we share all decisions on DSs care etc.
When DS was 3.5-4 years old he had a horrible brain regression which left him with severe learning disabilities and autism. Doctors have been trying to figure out what happened for years and they finally have decided it must be some form of very rare genetic disorder and all of our DNA is going off to a research study to hopefully find out more.
To care for DS I had to leave work, I never sleep, I spend all of my time on his therapies and care and basically dedicate my life to him.
I have a DP, we have been together years and he shares some of DSs care but we can't live together, because of his work hours and how much care DS needs, it just wouldn't be healthy.
DP is a lot older than me and has two grown up children of his own.
I don't want more kids, I feel that firstly it wouldn't be fair as all my time goes on DSs care, I don't have the energy for another child, I'm worried the same would happen to a second child, and there is enough humans in the world anyway, I would have preferred a small age gap and DS is 8 now so that's out of the window, and DS hates loud noises (so a baby crying wouldn't be brilliant) and I hardly get any sleep as it is, I don't want to sacrifice the little amount I get just to have a baby.
DP doesn't want more kids.
I understand that some people in my situation do go on to have more children, and I'm not saying that's wrong, but it's not something that I want to choose.
My family, however, seem to feel passionately about the fact that I need more kids, they argue that I love children and am just cutting my nose off to spite my face, this ends up in massive family arguments.
My sister, however, doesn't want children because she wants to concentrate on her career, and apparently this is fine, but my reasons aren't.
Every time my family come to visit (live very far away) they always bring up the subject of me having more children, and it always ends up in a massive fight 
I don't see them often at all and don't want to fight with them, it's starting to get to the point where I don't want them to visit because I'm sick of justifying myself to everyone.
Are my reasons really that unreasonable? I do love children, I have qualifications coming out of my ears in working with children, but I just don't want any more.