http://www.ckbr.org/
http://www.bluegrassboxerrescue.org/
http://adopt-a-boxer.1-800-save-a-pet.com/
Here are a few links to help this animal, I won't even go into my personal feelings on this matter, as to do so would make your ears melt. I will say that is people like you that have a throw away dissasociative attitude towards companion animals, that make it possible for me to blessed with fostering and rehoming and getting to know so many animals that are much more amazing and smart than the owners that had them. So I guess I should thank you.
As for your kids and dogs in the house, I had kids, and rotties , and as all babies do the pups got knocked over and the babies did too. Everyone survived amongst laughter and tears for the boo boos. Too bad that you cannot find the same love for your dog, that she has has for you.
Hopefully, you will put aside your wallet and make the decisions that are best for the animal, at least once in this saga.
Just my thoughts