Gossip Girl star Leighton Meester's mother dropped her countersuit against the actress, in which she claimed a breach of contract regarding a verbal agreement that stated Leighton must pay her $10,000 every month.

Leighton first filed a lawsuit against her mother, Constance Meester, in July claiming the $7,500 she sent home each month to help care for her younger brother was misused by her mother for personal reasons such as cosmetic surgeries, to which Constance countersued.

Constance's counterclaim asked $3 million in damages, stating she was owed the money for supporting Leighton's career.

Leighton Meester is suing her own mother, and it seems she's not the only one in her family who's had their day in court.

RadarOnline.com has exclusively uncovered numerous drug-related arrests and mug shots against her mother's sister, Leighton's aunt, Judy McNelis.

McNelis, 68, was arrested in Florida in 1998 on felony for possession of marijuana over 20 grams and possession of narcotic paraphernalia.

Leighton Meester is suing her mother and now RadarOnline.com has exclusively learned she wants her younger brother to live with her instead of with their mom.

Leighton, 25, regularly sent money to her mother, Constance Meester, to help pay for her brother's health needs, but the in the lawsuit filed on July 22, 2011, Leighton claims her mother used the money to get cosmetic surgeries for herself instead.

"Leighton is disgusted by her mother and is determined to get her brother Lex out of that situation," an insider told RadarOnline.com.

The mother of Leighton Meester "threatened to kill" one of the Gossip Girls star's former pals, RadarOnline.com has exclusively learned.

EXCLUSIVE COURT DOCUMENTS: Read Restraining Order

Laurel Wiig won a restraining order against Constance Meester, the actress' manager, after an ugly confrontation on January 21 in which she threatened to "hunt down and kill" and "f*ck up" the woman.

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