WA state. My husband and I were separated for awhile and during that time I became pregnant. My husband and I decided to work things out shortly before I found out and decided to raise the child as his. My question is: Do I legally have to inform the biological father of the child's existence and if he were to find out what are the chances of him gaining visitation to the child (I do not consider him to be financially, or otherwise, stable)?
I can just about guarantee that if you are not honest with everyone involved, including the biological father AND the child, it will come back to bite you in the behind later. If I had a dollar for every case that has been posted on these forums, that came back to bite someone in the butt, I would be a wealthy woman.
Legally, your husband becomes the legal father by default. You are not under any legal obligation to inform the biological father. If he does find out, he is legally allowed to file to establish paternity and visitation pretty much until the child becomes a legal adult. There have been judges that refused to disrupt teenager's lives, but that is not really the norm.
Once again, be honest with everyone or risk serious issues down the road.