Kendall claims that two-and-a-half years ago, her mother, Jill, punched her in the face, her stepfather, Anthony, threatened her, and her sister, Lyndsey, choked her.

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“That never happened,” says Lyndsey, who categorically denies Kendall’s accusations. “In my eyes, Kendall’s a pathological liar,” she adds.

WATCH: ‘You Just Can’t Believe Anything She Says,’ Claims Mom Of 14-Year-Old

Kendall’s father, Brent, says at the time of the alleged incident he took Kendall at her word. What does he say happened later that caused him to change his mind?

Check here to find out where you can watch part one of this two-part episode airing Monday.

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