Kyle Richards: Reality TV Won’t Ruin My ‘Solid’ Marriage

updated 10/12/2012 AT 8:10 AM ET

originally published 10/12/2012 AT 3:25 PM ET

Most of Kyle Richards’s Real Housewives of Beverly Hills costars don’t have a good track record when it comes to keeping their marriages intact while on the show – but Richards is certain her relationship with hubby Mauricio Umansky will not crumble in front of cameras.

“I am like a lion with my family, my cubs,” Richards, 43, told PEOPLE at Thursday’s grand opening of her Kyle by Alene Too boutique in Beverly Hills.

“I’m very, very, very protective. If I ever felt like something was being affected in any way by the show, I would just walk away in a millisecond,” she says.

Adrienne Maloof is the latest cast member who Richards has watched go through a split. The reality star’s husband, Dr. Paul Nassif, filed to end their marriage on Aug. 28.

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