My wife is selfish for carrying our children and not aborting and I'm going to tell her.
Is there a reason you're going to say that?
Yes, she does have a short temper
It's your wife's body and her choice, it's not selfish of her for keeping the child and it's quite rude for you to assume that. She may value that kid's life more than anything now, and it's not your choice to destroy all of that.
It's my damn money and I don't want to pay for a kid I don't want.
You are responsible for said kid and your opinion when it comes to a woman's choice is minimal. You are a parent and you should feel responsible, be it via love, care, time, money, hopefully each of these things.