“RHOSIC” Star Mary Cosby’s Son Robert Pleads Guilty To A$$ault & Trespassing Following Altercation w/ Estranged Wife & Father-In-Law, Ordered To Stay In Jail Until February Sentencing

“RHOSIC” Star Mary Cosby’s Son Robert Pleads Guilty To A$$ault & Trespassing Following Altercation w/ Estranged Wife & Father-In-Law, Ordered To Stay In Jail Until February Sentencing

#MaryCosby’s son won’t be home for #Christmas.

The son of the #RHOSLC standout, Robert Cosby Jr., has pleaded guilty to eight criminal charges, including a$$ault, criminal trespassing, and violating a protective order, following a string of incidents involving his estranged wife Alexiana Arian Smokoff and her father.

According to court documents obtained by PEOPLE, the original indictment listed 14 charges; six misdemeanors were dismissed with prejudice as part of the plea deal. Robert Jr. was booked into Salt Lake County Jail on November 9, 2025, and remains locked up without bail. A judge is set to determine the length of his sentence at his next hearing on February 3, 2026.

Prosecutors say the incidents, which happened between September and November, reportedly included two attempts to break into his father-in-law’s home (once allegedly through a dog door), a physical a$$ault on him, property vandalism, and even biting a police officer during the arrest. As part of the plea deal, a protective order was issued, barring Robert Jr. from harassing or contacting his ex, who filed for divorce late last month, or her family.