Well for one. I dont agree with monogamy. If you are married and your husband is unfaithful then leave or be unfaithful too. Marriage is a 2way commitment to monogamous love so if you made that commitment stick with it or just leave.
Your children are your children... they should never take up the emotional role of your spouse/significant other.
You dont treat anyone like royalty when they treat you like shit. Why reward someone who is not honest with you?
So many more reasons I just can not agree.