Quoting S.:" I’ve been in that situation. Its so hard. I don’t know if this helps at all but my daughters refusal ... [snip!] ... him away and its been a year and a half now with absolutely no contact. My fiancé is her daddy and she couldn’t be more happy."
Sometimes it works our perfectly like your situation
If its one thing i've learnt so far, just because they share blood doesn't mean more than just that. Blood makes a biological bond. But if theres no love it doesnt mean more then just blood
Who we chose to love and form a bond with is what means the most. This will trump blood every time.