Fiancé Has 15 Year Old Dismissed Dv Charges, Will This Affect My Custody

Location: Washington State
My fiancé has 2 dismissed dv charges from 15 years ago resulting from a custody battle with his child’s mother (he had full custody at the time of the allegations and has had full custody to date). Both charges were dismissed and there was overwhelming evidence in the first charge that she was lying (her own friends and family submitted letters that they were there and she was lying). The second charge were allegations of dv to my fiancé’s child, cps checked it out and returned the child to my fiancé immediately. The mother also has a history of substance abuse and mental health issues that she admitted to the court herself. A few years later he filed a restraining order against her for harassment. He tried his best to allow her in their child’s life even after the false allegations but she remains uninvolved for the most part.

I have an every other weekend and holiday schedule with my child, her father has primary custody. This is partially due to a past partner of mine abusing me in front of her. I have waited a significant amount of time to move in with my fiancé due to a number of factors, but mostly building up the trust with my child again and also making sure that my now fiancé is a healthy relationship which he has been extremely understanding of. My child and fiancé have a great relationship and they have expressed many times how happy they are we are getting married and moving in together.

Now that we will be moving in together I am expecting my child’s father to take me to court over my fiances dismissed charges. What is likely to happen?