Liz says when she met Sarah, Sarah told her she had terminal breast cancer. She says she and Sarah quickly grew close, and Liz and her husband, Brian, invited her into their home numerous times. Liz says Sarah would text her numerous times a day, and Liz would stop what she was doing to help her.

That’s why, Liz says, when Sarah told her she was being stalked by a woman who was in love with her “husband,” Liz grew concerned.

In the video above, hear how Sarah lied to Liz about being in a shootout with this alleged stalker – and why Liz claims it was premeditated based on personal information Liz shared with Sarah.

On Friday’s episode of Dr. Phil, see what happens when Liz and Brian come face-to-face with Sarah. Will Sarah apologize? And on Monday, Sarah is confronted by another former friend who is a cancer survivor. Is Sarah finally ready to change her ways? Check here to see where you can watch.