"I have a problem with teaching DD that it's OK to be this type of a family so that she grows up thinking divorced families are normal and fine."
Do you want her to grow up feeling that her family is "wrong"? I don't think our kids need lessons on whether divorce is right or wrong anyway, they'll remember the pain for as long as they live and will KNOW there should be a better way. Our job is to help them recognize that we can and should make the best of what is left. That's not right or wrong, that just is!