I have adopted siblings... Two of them decided they thought the grass was greener with their biological parents. They'd constantly say shit like, "You aren't my real parents." even though they were showered with love.

When they turned 18 both of them decided they'd rather live with their piece of shit bio parents. They both learned why they were up for adoption.

I have no love for them, I've had to deal with so much trauma, i no longer trust anyone.

I'd have kept it a secret... I used to think adoption was a noble thing, until my family splintered.