Our state supreme court ruled that sexual conduct cannot be used in a custody case unless it directly impacted the minor child. So in other words, unless the unfaithful mother is doing her affair partner on the dining room table with the child watching, it's not going to matter.

So the faithful father is on the same footing as the unfaithful mother. If she's a stay at home mom, there is no way dad is ever getting custody in my state as long as his only complaint is her affair.

The law here supports that outcome, and until you change the law, no fight will change the outcome.