I don't necessarily want kids. A lot of our friends are having children and I don't know if it's for me. I haven't come down hardcore on either side of the argument. I think when people come from a stable family having children becomes a celebration and I'm not sure it would be that way for me.
If you enjoy math and you write novels, it's very rare that you'll get a chance to put your math into a novel. I leapt at the chance.