Real Housewives of New York City star Ramona Singer filed for divorce from her husband Mario Singer on Tuesday upon discovering that he was carrying on an affair.

Ramona Singer Catches Husband Cheating, Files For Divorce

Though the Singers casually flirted with people outside their marriage, Ramona apparently found it difficult to wrap her head around her husband stepping outside their marriage and being unfaithful. She allegedly caught him with Kasey Dexter, 27, who he’s reportedly been seeing for a year, according to the New York Daily News.

"They both flirt with other people, but Ramona was shocked to learn that her husband was actually seeing someone," a friend of Ramona’s told People. "Neither Ramona nor their friends thought anything would go beyond a flirty stage. Of course it hurts, but Ramona is like dynamite and Avery is also strong. Ramona has her own business, the TV show and lots of hobbies like skiing and tennis."

"She will survive," the friend added. "Ramona will stick it to Mario. She is bubbly and fun and will find herself plenty of younger guys!"

On Twitter, Singer has kept things positive – from sharing her stress-relieving workouts to thanking fans for their support. She also posted a quote by C. JoyBell C. about not being fearful of change.

Ramona and Mario Singer have been married for 22 years and have one daughter together, Avery, 19.

The Real Housewives of New York City’s sixth season will kickoff on Bravo March 11.

– Chelsea Regan

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