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.