My sister needs help

As some of you may know, and some of you may not, Brittani is in jail. Brian had her arrested for being 2 months behind in child support. She is stuck in jail until she pays $4300.00. Most of that is Brian's attorney fees. It is a messed up situation. She is asking anyone that can help please do. Anyone who knows my sister knows she is not a person who needs to be in jail or deserves to be there. She was actually at work when they arrested her. Any help would be greatly appreciated.