Brian and Liz say that six months after meeting Sarah and becoming good friends, they learned the truth about her. They say she lied to them about having terminal cancer, being married and having a 15-month old daughter, among other things.

In the video above from Wednesday’s episode of Dr. Phil, hear about the lengths they say Sarah went to perpetuate her lies.

“It’s maniacal,” says Liz who says she feels betrayed and humiliated by Sarah. “It’s just sick.”

On Wednesday, learn how Brian and Liz, who opened their hearts and home to Sarah, found out that she was deceiving them. And see what happens when they come face-to-face with Sarah. 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.