TV Guide has a preview of a major upcoming story line on General Hospital:

On future episodes, Kate thinks her wedding to Sonny Corinthos is cursed after finding blood on her reception dress. That's always a problem.

On September 19, the character's cousin Olivia — who had a fling with Sonny back in high school — will show up at the wedding with some startling scoop about Kate's secret past. The role will be played by ABC soap stalwart Lisa LoCicero (Loving, The City, One Life to Live).

"Sonny has invited Olivia to the wedding, unbeknownst to Kate," LoCicero says about the angle. "He doesn't know there was quite a rivalry between the two women or that Olivia has something under her belt that's going to create big excitement—and a lot of friction."

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.