Brother Of Nancy Motes' Fiancé Calls Julia Roberts a 'Monster'

America's Sweetheart, Julia Roberts, is being called anything but sweet by one man who says she was embarrassed by her half-sister who died of an apparent drug overdose. INSIDE EDITION has the exclusive interview.

They're explosive claims about Julia Roberts.

"Julia Roberts didn't want to have a fat sister."

This man says Julia used to bully her half-sister, Nancy about her weight issues.

Conner Dilbeck is the brother of Nancy's heartbroken fiancé.

"She was ashamed of the fact that she had an ugly person—in her perspective—in her family," said Dilbeck.

Nancy was found dead in an apparent drug-overdose suicide last weekend.

Conner says Nancy was tortured by what he calls "fat-shame" phone calls from Julia.

INSIDE EDITION's Diane McInerney asked Dilbeck, "When the rest of the world is calling Julia Roberts America's Sweetheart, what would you call Julia Roberts?"

"A monster," replied Dilbeck.