Yes, since you have been doing this, the chances are good a court would allow you to keep doing it. You need to file a third party custody. As part of this, you need to ask the court to give you the social security checks for your sisters and to order your mother to pay child support. The social security belongs to the children not to your mother and does not count toward her child support obligation.
Answered on Apr 10th, 2014 at 12:11 PM