Nta from your situation it honestly sucks, but I feel like you did the right thing, but I also feel like you should explain to your youngest son why this is happening because he probably doesn’t know why his sibling had stopped calling you dad etc. but it seems like you are willing to do anything for your son but id be careful and make sure there not Manipulating you into doing things because you care about him and also your feelings are completely valid. Also First like
NTA, but you are better off letting them go and leave with your bio son and never look back or order them to leave your house and go back to to the bio dad full time wherever he is.
