Sarah claims her younger brother, Blake, is “a complete hothead” who has threatened to kill her, her boyfriend, their mom, and their grandparents. “He could snap at any moment. It’s part of the reason I keep my distance from him.” “You get Blake upset, and he does the unthinkable,” she adds.

On Thursday’s Dr. Phil, Blake admits he once defecated on Sarah’s front porch because they argued. “I thought it was hysterical,” says the 26-year-old, continuing, “My mom had to clean it up – and I would do it again.”

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Blake’s mom, Sandra, asks, “What person in their right mind does something like that?”

“It’s not that big of a deal,” says Blake.

“Something’s not right – there’s a screw loose, for sure,” says Sarah. She claims Blake has “a huge chip on his shoulder” and carries a lot of resentment towards her.

Blake says he thinks his sister acts like “a private school sorority [expletive] stuck-up bitch.”

Why does he say he resents her so much? Click here to find out where you can watch Thursday's, Dr. Phil. 

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Woman Says Mom Enabling Younger Brother Has 'Created A Monster'