RTL, you are an amazing father and one day your daughter will benefit from all your efforts. She will always know that no matter what, you fought for her and did not just walk away, it will make a huge difference in her life. Your evaluator sounds like a true professional and he will see this. I have not been able to find your whole sitch but the evaluator will see one thing. The fact your wife has allowed a 4 year old to know and see her with a man who is not the father, who may be temporary is beyond selfish. It is not the infidelity they worry about, it is the ability to involve the child, who may be further traumatized by forming an emotional attachment to another man who may not last at the same time as having her father disappear from her physical space. I think you will do just fine with the custody issue.