“My brother, Mark, has lived a life of destruction for 20 years,” says Jill.

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She says the 41-year-old was living in a storage unit a few years ago and currently lives in his car -- which is held together with bungee cords and glue -- in a big box store parking lot, is constantly losing things and puts his trust in the wrong people. She claims that he takes advantages of their parents and refuses to grow up.

WATCH: 'I Call It Urban Camping,' Says Man Living In His Car

“My brother’s a Christian. Religion definitely makes him oblivious to the consequences of his own actions. He doesn’t see the life of destruction that’s his path,” Jill says.

Jill shares her concerns about Mark with Dr. Phil on Friday’s episode. Watch in the video above.

And on Friday, hear from Mark and their parents. Is Mark ready to change, and are his parents ready to stop enabling him? Check here to see where you can watch.

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Parents Say Son Is An Adolescent Living In A 41-Year-Old’s Body