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.
"She's doing as well as can be expected," Richards says about her pal. "I think they're both having a hard time. I think any time someone gets divorced, it's sad – especially for the kids. I think a lot of people liked [watching their bickering on TV] and thought it was cute, but obviously there was more going on behind closed doors than we realized."
Based on her own experiences and what she's witnessed within her social circle, Richards says, "My suggestion to anybody who [wants to do] a reality show, if you have cracks in your marriage, don't do one of these. You have to be really, really solid in order to do a reality show like this. I feel solid."
Although her marriage isn't a source of drama, the new store owner admits she'll have her own share of issues play out when season 3 of Bravo's hit series premieres on Nov. 5.
"Some days I'm excited [about the new season], Richards explains. "Some days I'm scared. I'm telling you, wherever we go, problems seem to follow."