Not until the parental rights of the biological father have been terminated.
There are a couple ways to do that:
They have to adopt the child, otherwise you should pay.
No. In order for your brother to adopt your child you and the other parent must consent to the adoption and then your parental rights will be terminated. Your brother would be the legal parent of the child. You cannot share legal custody with your brother.
Your actual father (biological father or husband of your mother at the time of your birth) does not need to adopt you; you are already his child. What is usually more relevant is "how does your step-father adopt you" or "how does your dad get exclusive custody of you." The answers to these questions differ greatly from state to state and country to country.
You now only have physical custody, but both you and your husband have equal custody rights to the child. That means he has a right to have physical custody too, and will not get into any trouble if he physically takes the child into his care. If you are afraid he might take the child, you will need to obtain a temporary custody order, signed by a judge, to make sure you become the custodial parent. That said, depending on your husband, the longer you have physical custody of the child, the more difficult it will be for your husband to obtain legal custody should you divorce.
Normally, when a married couple are divorced, and there is a child involved, the court will issue a ruling about who has custody. A mother may lose custody if she has been deemed by the court to be an unfit mother or a danger to the child, in which case the ex-husband would gain sole custody. If no such ruling has been made, then the ex-husband would have no right to simply take the child without permission. That is a form of kidnapping.
The only way you can adopt a child is that you have no child of your own at all. I have 2 girls of my own and live in america. my husband wanted to adopt a child in Iran. You also need to have a house or a land under the child's name in order to adopt a child.
file for custody
Legally you can not force your child to give up the custody. They are the guardian of their child and not you, no matter how old they are.
Once a child is in state custody I don't think the mother has a say in who adopts the child. However, you may be allowed to meet the adoptive parents.
no, she must approve
no
Under most circumstances, the father must grant permission.