Kyle Richards shows off gym progress amid estranged husband Mauricio Umansky’s new romance

Muscle mommy.

Kyle Richards flaunted her toned and muscular figure as her estranged husband, Mauricio Umansky, moved on with another woman.

The TV personality posed on a workout bench while flexing her growing arm muscles and abs in a sweaty gym selfie posted to her Instagram Story Sunday.

Kyle Richards flexed her arm muscles in a new gym selfie posted to Instagram Sunday. kylerichards18/Instagram The sweaty selfie showed the “Real Housewives of Beverly Hills” star, seen above in July, wearing a white sports bra and high-waisted leggings. @kylerichards18/Instagram

Richards, 55, wore a white sports bra, black high-waisted leggings and purple sneakers for her workout session.

A pair of dumbells sat at her feet while a barbell with weight plates also appeared to be in use.

The “Real Housewives of Beverly Hills” star often shares photos of herself breaking a sweat in her home gym and most recently posted one to celebrate two years of sobriety.

Richards shared the progress picture amid her estranged husband Mauricio Umansky’s whirlwind romance with Nikita Kahn. mumansky18/Instagram The “Buying Beverly Hills” star and the 33-year-old sparked romance rumors in July. TMZ

“This week was my 2 year anniversary of being alcohol free (July 15th) I can remember a time when the idea of going 2 weeks seemed impossible,” she captioned the photo of herself flexing her bicep.

“I’m proud of the fact that I’ve had the willpower to stay on this path … My mental and physical health became a lot more important to me.”

Richards alluded to her separation from Umansky, 54, adding she’s thankful to be sober while going through “difficult times.”

At the time, they were photographed kissing at an airport in Greece. Instagram/@nikitakahn The photos of Umansky and Kahn making out sent Richards into a spiral, her sister Kathy Hilton told Page Six. kylerichards18/Instagram

The former couple announced their separation in July 2023 after 27 years of marriage.

They share daughters Alexia, 28, Sophia, 24, and Portia, 16, and Richards is also a mom to her 35-year-old daughter, Farrah, from her previous marriage to Guraish Aldjufrie.

While Richards has remained publicly single, Umansky has since started dating model Nikita Kahn.

The “Buying Beverly Hills” alum and his 33-year-old girlfriend were first romantically linked in July when they were spotted packing on the PDA at an airport in Greece.

In August, the Netflix star and Kahn enjoyed a getaway to Mexico. TMZ During their vacation, they were seen getting handsy. mumansky18/Instagram

At the time, the two reportedly got cozy for a week-long getaway at a ritzy Mykonos beach escape.

The following month, Umansky and Kahn soaked up the sun while vacationing at the One&Only Mandarina resort in Mexico.

They were photographed all over each other while taking a romantic dip in the ocean, per photos obtained by TMZ.

In July 2023, Richards and Umansky revealed they were calling it quits. mumansky18/Instagram At the time, they had been married for 27 years. kylerichards18/Instagram

Despite giving Umasnky the green light to date other people, Richards allegedly had a meltdown when saw photos of him kissing the Ukrainian-American actress on vacation in Greece.

The “Halloween” star’s sister Kathy Hilton exclusively told Page Six she had to “calm” Richards down when she saw the PDA-filled snaps.

“I think it was a hard pill to swallow seeing it,” the fashion designer told us in July. “So what I’m trying to do is just kind of calm her down a little bit. ‘You know, this was bound to happen. You’ve been separated.’”