I am shocked at the amount of posters saying the OP is in the wrong. It's her husband who being an asshole, not her.
I love my husband - of course I do, and there is very little I wouldn't do for him. But if it came down to it, and I had to say.... give a kidney to save HIS life, or one of my 2 kids lives, it would be a no-brainer. Of COURSE I would put them first.
Any man who sulks because his wife said she would put the children before him and loves them more than him, is a childish, attention-seeking diva. Similarly, I would expect him to put them before me too, and would be shocked and upset if he said he would put me first.
No-one, and I mean NO-ONE would be put before my 2 kids. Not even my husband, no....
Maybe the OP said it in a clumsy, 'jokey' way, but surely her husband should 'get' that any normal woman loves her children more than anyone else; yes even her husband. I would find it very odd if someone said they would put their husband before their kids, and that they love him more.