my daughter is 7 and hasn't seen her biological dad for 4 years but considers my partner as her real dad. He hasnt paid any maintenance at all but she does still see his parents as it was only him who didnt want contact. The older she gets the more worried i am about what would happen if i was in an accident? Would she be sent to live with a man she doesnt know just because hes on her birth certificate? Would it make a difference if i was married to my new partner? Or if my ex relinquished his parental rights?