Yes, dependent on two factors.
In 30 states, where the child has developed a father/child relationship; or In 20 states where once the man has begun taking financial responsibility for a child, he is obligated to continue that responsibility, regardless of Paternity. In Missouri, you have two years to challenge responsibility, in accordance with a law passed July 3rd. In January, the Kansas Legislature turned down any law allowing a man to discontinue responsibility, even if he's never had contact with the non-biological child. See link
when or why? Mothers will lose custody if they are found unfit by a family court
Yes, provided they have learned their lesson. Unfortunately, the same is not applied to mothers with criminal backgrounds.
Boyfriend or husband (unless he is the biological father) has no legal right to the child at all. The mother can try to go for full custody though.
i think the birth mothers where there to take care of a biological mothers child to help out
yeah I believe you can, I think you get a choice when you are 13 which parent you want to live with
No, both biological parents are obligated to care for their child. However, it depends on the circumstances and the court orders in the case.
Only the legal guardian can sign so if the parents are divorced he can sign if he has full legal custody. Otherwise not.
file for custody
Yes she can. Unwed mothers assume an automatic temporary custody, until the case is decided by the court. The only way to stop her from moving is to file for custody ASAP. Once filed, the state has jurisdiction and she can't move.
Courts will sometimes give custody of children to mentally ill or borderline mothers. It will depend upon the severity of their cases and they will be assigned social workers.
Sole custody is not common these days except for single mothers. see links
Single mothers have sole custody until the court rules otherwise, but in Texas you can get a jury trial.