I grew up in a joint family, and the Father of the house was my grandpa. it was a traditional Indian household, tbh. where the ladies in the house were practically always behind the scenes. so, while i would really love to say that my mom played a great role in who i am today, i don think i can say that. Yes, she is one of the strongest people i know, but i know that from after when i turned 16 and we moved away from my grandparens' house.
my grandfather raised 4 boys and then he raised me. while he had help of my grandma in the first 4 instances, in my case, he had the help of my father and uncles. i dont remember as a child when my ma took me to buy clothes or toys even. it was always my grandpa/ dad or one of my uncles. ( i am talking about father figures here, and i had 5, growing up!)
so, i dont think having two 'dads' (as in my dad in relationship with another man) would have changed much in my life. (other than the fact that my dad is more like my friend than a real father! )
It was hard adjusting later on, when i had to live with just my parents! explains why i left home at 17 and didnt look back!
Hope i was on topic!