i believe that wether a child has two mothers, one father. or two fathers, or two mothers (in the case of homosexual couples) they will be 100% fine and healthy as long as they are nurtured in a such away. i know a lesbian couple who are raising a daughter together. this daughter is amazingly intelligent, witty, and so sweet. she is well behaved and scores the highest in her classes. a lot of people think that children can only be raised by a nuclear family of man and woman but that is simply narrow minded and not the case.
Thats a whole other discussion! The issue here isnt about two mothers in the sense of lesbians, but in the sense of a man marrying two women at the same time (polygyny)