LeAnn Rimes admits she worries Eddie Cibrian will cheat on her.
The country singer and the actor started an affair after meeting on the set of TV movie Northern Lights, despite both being married.
The 30-year-old has confessed the way their relationship started has had an impact on their ability to trust one another.
"I would be ignorant to say, and everyone else would think I am a liar if I didn't say yes, and I have at times," she opened up to Entertainment Tonight.
"Speaking for him, I would actually say that's creeped into his [mind]…I think we've been very honest and open with that to each other and our conversations about it have only made me understand how much he actually cares, as much as I do, about being faithful to each other."
LeAnn recently made it public she had checked into rehab for stress and anxiety-related disorders.
The pretty star began her musical career at the age of nine and blames being thrust into the showbiz industry so young for her emotional problems.
"I feel like there's only about a handful of people that could understand where I've been through as a childhood star and now actually having a career after that," she explained.
"It's hard to explain and I'm not asking for anyone's sympathy. I think when you see all these things written about you and what people are speculating you want to go, 'This is why' and it's just as simple and as complicated as I need to go learn how deal with myself and with the world because everyone is always looking in and I needed to figure out how to deal with it."