“Brittany is, without a doubt, a pathological liar and a sociopath,” says Haley about her former friend. “She’s 100 percent careless about hurting people and destroying their lives.”

TELL DR. PHIL YOUR STORY: Conflict so big it needs a Dr. Phil solution?

Haley claims that when she first met Brittany, she told her that she had just delivered stillborn twins and that she was living with an abusive partner.

“Brittany showed me a picture of her actually holding two stillborn babies in her arms in a hospital bed,” Haley says. “I felt so compassionate and empathetic, and I wanted to take her to my home and help her get back on her feet.”

WATCH: Woman Claims Former Friend Constantly Tells Lies, ‘Destroys Men’s Lives’

Haley says she let Brittany live with her and a little while later, Brittany asked her to write a witness statement so that she could get the death certificate for her twins.

“I said, ‘Well, I can’t give you actual witness statements because I wasn’t there, but I can give you a statement that says I was aware of the births because I saw the picture.’ I wrote those statements, got them notarized,” Haley explains. She says months later, she was questioned by a detective as a possible accomplice in a felony forgery case. “Brittany took the notarized papers, changed all the words but kept my signature and the notarization. I was livid. Livid. It was just too much.”

WATCH: Woman Claims Former Friend Is ‘Absolutely Dangerous’

Haley says that’s when she learned that the woman she thought was her friend had been lying to her. She claims that Brittany was never pregnant and had photoshopped her image on an image of another woman holding two stillborn babies.

“I felt completely used, completely taken advantage of on the deepest level,” Haley says. “Brittany is an incredibly mentally ill woman. With Brittany’s obsession with her being a mother, her lies to men, her manipulations, her hustles – anyone dealing with Brittany needs to watch their back.”

On Monday’s episode of Dr. Phil, hear from a man who claims he is one of Brittany’s victims. On Tuesday, Brittany tells her story, and Dr. Phil tries to uncover the truth. How does she explain the alleged web of lies her former friends claim she tells? Check here to see where you can watch.

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Woman Who Calls Former Friend A Pathological Liar Says She ‘Gets Away With Everything’