Luann de Lesseps‘ decision to return to rehab came as a surprise to both her fans and her costars.

Appearing onWatch What Happens Live with Andy Cohenon Wednesday,Real Housewives of New York CitystarTinsley Mortimeropened up about her reaction to the news, admitting that she was “totally in shock” when she found out.

“Because I was so proud of her … I had a mugshot in Palm Beach, too, and I just feel like I turned it around and I felt like she was doing that,” said Mortimer, who wasarrestedin April 2016 for allegedly trespassing at her ex-boyfriend Alexander “Nico” Fanjul’s Palm Beach, Florida, home. (Their relationship was highly tumultuous and there was a history ofalleged abuseprior to the arrest, including an incident on Christmas Day in 2013 when Mortimer washospitalized with head lacerations.)

Mortimer, 42, also praised De Lesseps’ recent return to show business, which included a string of sold-out cabaret performances called#CountessAndFriendsat New York City’s Feinstein’s/54 Below.

“The cabaret show is so amazing, and I was just so proud of her,” Mortimer said. “It’s just sad. I wish her the best, and I hope that she can work everything out.”

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‘Dressed to Kilt’ fashion show and ball, New York, USA - 27 Jan 2017

De Lesseps firstchecked into rehabin December 2017 after she was arrested on Christmas Eve in Palm Beach and charged with disorderly intoxication, battery on an officer, resisting arrest with violence and threatening a public servant. (She’s sincepleaded not guiltyandrejected a plea dealin February.)

She laterapologizedfor the incident, admitting that being back in Palm Beach for the first time since shetied the knot with Tom D’Agostino Jr.there beforedivorcing him seventh months laterhad “brought up long-buried emotions.”

RELATED VIDEO:Luann de LessepsSays Her Arrest Cost Her Friends and Boyfriends

Frankel told PEOPLE, “Recent additional family stress was a catalyst to [Luann] taking a break.”

The Real Housewives of New York Cityairs Wednesdays (9 p.m. ET) on Bravo.

source: people.com