Sherri says that 16 years ago, her life was changed forever when she received a letter claiming that her biological father was not the man who had raised her. She says that when she confronted her mother, Betty, her mother denied the allegation and snatched the letter from her and hid it.

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“My mother is a big fat liar,” Sherri says. “I don’t know if I’ll ever heal or get over this. I want my mom to take full responsibility for what she’s done.”

WATCH: Why Woman Says 'It Feels Like My Whole Life Is A Sham'

Betty, however, claims she’s done nothing wrong. She says she only saw the man Sherri claims is her father about three times and that she didn’t really know him.

“I didn’t know anything about him. I do not remember sending him her picture when she was a kid,” Betty says. “I feel like Sherri’s just making a big deal out of things so she can get what she wants in life.”

In the video above, Betty defends her behavior and maintains that she didn’t purposely deceive her daughter. See how Sherri responds. And on Thursday's episode of Dr. Phil, will this family be able to find closure? Check here to see where you can watch.

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