The older sibling of a college sophomore who says she’s a sugar baby claims her 19-year-old sister, Kalli, “has a really dark side.” Taylor says “My fear is that one day my sister will get so mad that she won’t be able to control it, and she may do something serious.

TELL DR. PHIL YOUR STORY: Fed up with an entitled 20-something?

Kalli, who admits accepting money from older men who are willing to pay her to date them says, “When someone really makes me mad I just want to tie them up. I want them to beg me to let them go. You don’t want to mess with me.”

“So, what are you so mad about?” Dr. Phil asks his guest.

“Like, if someone does something that like – like trying to embarrass me, or like just be rude to me in front of people, (like) … no,” says the teen.

Learn why Kalli says she likes being a sugar baby on Thursday’s Dr. Phil.

Click here to check local listings.

TELL DR. PHIL YOUR STORY: Accused of something terrible?

'She Gets Caught As A Prostitute – There’s Her Whole Future,' Says Grandma Of Teenage Sugar Baby