dadopted
When you're not the real dad, but the kids still think you're the best and you can't do anything about it.
I'm not the real dad, but my stepson still thinks I'm the best. He just called me 'Dad' in front of my ex.
They're not my kids, but they still act like they're my kids. I'm stuck with them.
My wife adopted my neighbor's kid. Now the kid thinks I'm his dad. I'm not even sure how that happened.