In December of 2010 we loaned $1500 to my mom and stepdad and were told they would start paying it back in February of 2011. They now have just gotten divorced, my mom has paid back her half, and in the divorce agreement he signed to pay back the other half. How do I go about obtaining this money from him? He also owes several other family members that loaned them money as well so can we all file together or does it have to be separate?