Can I sue a debt collector for sending my personal debt bill to other people?

As a matter of fact collection agencies are subject to fairly strict rtegulation about how and with whom they may communicate about your debt.  Sending information about your debt to another person, even though a relative, could be aviolation of Federal and Maryland law.  I syggest you use the Find a Lawyer feature of this website to find an attorney who specializes in consumer protection law.  Not only may you be able to receive payment from the collector if they violated the law the collector may have to pay the attorney's fees.  Violations like these happen regularly and, that iswhy there are laws to prevent what sounds like is happenning to you.  You may also wish to contact your State Attorney General who polices consumer protection matterssuch as this.