Jonni has spent nearly the past two years relentlessly searching for her 23-year-old daughter, Christina Morris, who disappeared after a night out with friends.

“I don’t know how to stop. I’ve searched for Christina 10-12 hours a day. I’ve looked in dumpsters, abandoned buildings, in fields, swamps – there’s not a spot that I’ve missed,” Jonni says.

However, Jonni says her mission to find Christina – who vanished in August 2014 – is tearing her marriage apart.

“My obsession to finding my daughter is destroying my marriage. I definitely feel like my husband [Ronnie] does not understand how deep my pain is … I told Ronnie I didn’t care about him, I didn’t care about anybody but Christina,” she says on Tuesday’s Dr. Phil. “Christina comes before anybody, including my husband and my stepsons, because Christina is the first love that I’ve ever felt in my entire life. I cannot think about anything else until I have closure.”

Can Dr. Phil help Jonni and Ronnie save their marriage as they continue to search for Christina?

If you have any information on the disappearance or the current whereabouts of Christina Morris, please call the Plano Police Department at 972-424-5678.