At My House

Reading about gay adoptions there seems to be a fear that children raised by gay parents will be have confusion with gender rolls as they are growing up. In some ways I would contemplate that being a valid argument, but I just realized it isn't valid at all.
I own a house and my friend and her daughter live with me. My friend and I are both heterosexuals, but of course I offer her help taking care of her daughter. Her daughter loves living here. She loves different people making her dinner or helping with her homework everyday. She knows that her mother and I both work, go grocery shopping and pay the bills. We don't share a bank account or anything, but I'm pretty sure we share responsibilities pretty similarly to a married heterosexual couple.
Her daughter thinks nothing of it. Of course sometimes she goes to stay at her dad's house or her grandmother's house, but during the week she is always here. At the end of the night everyone goes to their separate bedrooms and goes to sleep. So what would the difference be if we were gay? I feel like besides maybe a little more romantic love in the house, the only real difference would, two women going to the same bedroom instead of separate ones.
I'm not sure at this point that her daughter will live to lead a perfectly normal life, but right now she's like any normal 8 year old. I've not had a child living with me in my adult life up until this point. I just don't quite see that if everyone in the house loves and respects the child there could be a problem if they were gay or straight. I totally wish I could remember more about that My Two Dads show that was on in the late 80's or early 90's. I remembered loving that show.
That was not quite normal but obviuosly people liked the show cuz it was on air. Maybe those two men were closet homosexuals. Or even Full House, I don't know what Joey and Jesse did in the middle of the night.
I just can't see the problem with what your sexual orientation has to do with raising a child on a daily basis.