Melissa says she has harbored “violent urges” toward parents, Donna(,) and Mark Senior, for years. She says she left home a few months ago because she was afraid she was going to hurt her family and wanted to keep them safe.

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“I was tempted to go into my mother’s room and strangle her,” says the 26-year-old. “I wanted to come up from behind my father and stab him in the throat.”

“It’s very shocking,” says Donna, adding, ”especially in the way Melissa was raised; in a great, loving, safe home.”

WATCH: ‘I Had To Leave To Keep You Safe,’ Says 26-Year-Old To Her Mother

“It feels crushing,” says Mark Senior, who wants to know why Melissa feels the way she does.

And later, how does Mark Junior respond to his sister’s admission that, in addition to harming their parents, she wanted to hurt him as well?

The conclusion of this two-part episode airs Tuesday. Check here to find out where you can watch.

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