If the step parent files for custody, and the judge awards custody of the child to them.
When the child is 18.
see link
18.
They have to be 18,
From ONE parent is enough.
All children have parents
No, as that shows disrespect for the authority of the court. see link
16yo can not choose custodial parent at all. The court might listen to your opinion but that is it. And no, step parents do not have any legal right to the child.
In Virginia, parents are legally responsible for their child until the age of 18, unless the child is emancipated or the parents' rights are terminated by a court.
No, your parents or the court decides until you are 18.
From ONE parent is enough.
you can either be happy about it (i highly doubt it), or you can choose which parent to live with, or live with a different relative