VIDEO FLASHBACK: When Brooke Slapped Katie On The Bold And The Beautiful!

Since Thorne’s return to Los Angeles, Brooke has played referee between Ridge and his younger half brother on The Bold and the Beautiful. The role doesn’t come as a surprise to Brooke — she’s known about Ridge and Thorne’s rivalry for decades.

In fact, Brooke (Katherine Kelly Lang) can relate to sibling rivalry. She and her kid sister Katie (Heather Tom) have had their share of showdowns — both emotional and physical.

While both Katie and Brooke have left Bill in the dust there was a time when the Katie/Bill/Brooke triangle dominated B&B screentime. Brooke didn’t mean to fall for Bill, but she did. And Katie’s feelings got trampled on in the process.

But Katie’s a big girl, not afraid to tell her big sister exactly what she thinks of her for falling for her man. In the video flashback below, Katie cuts loose on Brooke, invoking the name of Stephanie, Brooke’s biggest nemesis, in order to drive her point home.

Take a look at the scene above and keep it in mind the next time Brooke criticizes either Ridge or Thorne for getting too physical with one another!

The Bold and the Beautiful (BB) airs weekdays on CBS. Check local listings for airtimes.