I couldnt agree more.
In my situation, i raised my son/stepson since he was 3. His dad pumped that kid full of bs every weekend. When my wife got pregnant, the pos told the kid he loved him too much to ever have other children. Just constant head games.
Now 40 year later, and the boy considers me his dad. I was the one always there, moving him back and forth to college, drywalling his house, taking his kids fishing. Doing what his real dad should have been doing. My boy has 4 kids, and they never got a birthday card or x=mas card from their real grandfather. Me, I blow the bank account up on those kids, cause their great kids and should have a grandfather figure.
I never tried to steal the guys son, he handed him to me on a silver platter.