Stephanie says her 38-year-old daughter, Monica, was a marathon runner and teacher until a few years ago when she suddenly got sick and lost 40lbs.

“On a bad day, Monica is in bed 22 of 24 hours,” says Stephanie, noting that her daughter, who is 5’6” and weighs approximately 90lbs., is in severe pain and “not very functional at all.”

Monica says that, among other illnesses, she has Sleep-Related Eating Disorder (S.R.E.D.), a condition that triggers her to binge eat during her sleep. Stephanie says that things have become so bad that they have installed locks on the cabinets and the refrigerator, and Monica chains herself to the bed at night.

“Monica is 100% dependent on me,” says Stephanie.

Watch the video above to hear why Monica’s friend Breanne claims that her dependence on her mother could be making Monica’s condition worse.

This episode, “Painfully Ill: Can Monica Be Saved?” airs Monday. Check your local listing to find out where to watch.

WATCH: Woman With Debilitating Health Issues Claims Her Family Is ‘Very Judgmental’

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