Kim Zolciak and Kroy Biermann.Photo: Charles Sykes/Bravo/NBCU Photo Bank/NBCUniversal via Getty Images; Paras Griffin/Getty Images

Kim Zolciak-Biermann, Kroy Biermann

Kim Zolciakhas made her split fromKroy BiermannInstagram official.

The reality star, 45, ditched her married name on her handle in a strong signal that she’s ready to move on after ending her nearly 12-year marriage to the former NFL player, 37.

Her move comes asReal Housewives of Atlantafans are eagerly awaiting the mom of six’s return to the Bravo show in a cameo that’s teased in a trailer for season 15.

It’s no surprise that Zolciak wanted to shed her ex-husband’s name. Sinceannouncing their divorcelast month — with Kim describing their marriage as “irretrievably broken with no hope of reconciliation” in her filing — the two have been locked in an increasingly contentious divorce battle.

On May 18, Zolciak filed a petition to have the Superior Court of Fulton County determineBiermann’s current drug usage. She’s asked for the retired NFL player to “submit to a five-panel hair follicle drug screen.” The request would require her ex to “not cut or remove any of his hair until such time as the screen is complete.”

The documents claim that Zolciak has witnessed Biermann smoking marijuana and because of that, she “has serious concerns for the safety and well being of the minor children” under his care. She’s also “fearful” their younger children — 9-year-old twinsKaia Rose and Kane Ren, plus sonsKash Kade, 10, andKroy Jagger, 11 — will be “exposed” to the substance he’s allegedly using.

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“Respondent’s time is so consumed with online gambling that she is unable to properly care for the children. As such, Petitioner is concerned for the children’s safety and well-being,” allege the documents, which indicate both parents “are presently in the care, custody, and control of the parties.”

Biermann’s legal team declared that this evaluation is in the best interest of all parties in order “to ascertain any underlying mental issues such as depression, anxiety, narcissistic personality disorder, bipolar disorder, attention deficit hyperactivity disorder or others that are manifested through Respondent’s compulsive gambling and other behaviors indicative of additional addiction issues.”

Financial documents included in the filing show a number of payments that were made to Coinbase, a cryptocurrency exchange platform.

A source close to Zolciak previously told PEOPLE of the allegations, “She’s been gambling, that’s true, but she has been winning. He is just trying to make it look like she has been losing money.”

source: people.com