Everyone is entitled to their own feelings and opinion but if you’ve got kids it’s a love like no other and after 5 years of raising a little girl who you believed to be yours you are now her protecter, her comfort and the man she wouldn’t trade for anyone. It’s not her fault why punish her you both love one another and he has already been a man a raised that baby. It would be heartbreaking for him yes but should be a reminder that your more of a decent parent than either of the girls bio parent