At 20, Maria and her sister, Liz – one half of a set of quadruplets – say that as long as they can remember, their father, Tom, has been aggressive and controlling, which Tom adamantly denies.

The siblings, who currently live with Tom, say their father’s house is cluttered, in disrepair, and covered in dirt. “You’re always very stressed out,” says Liz.

When Dr. Phil asks, “How do you live like that?” how do Liz and Maria respond? Watch the video above to find out – plus, hear why Maria says she is so angry that she self-harms and has put holes in the walls of her father’s home.

This two-part episode, '“Quadruplets: House of Chaos!” airs Monday. On Tuesday’s conclusion, “Quadruplets Face Off,” hear from Liz and Maria’s brother, Nick, and older sister, Antonia, who explains why she moved away from the family.

Dr. Phil airs Monday – Friday. Check your local listing to find out where to watch.

WATCH: ‘Living At My Dad’s House Is Like Living In A Psych-Ward,’ Says 20-Year-Old

TELL DR. PHIL YOUR STORY: Hopelessly in need of Dr. Phil's Help?