Bridal Shower Fears

My two sisters, one the MOH and one a BM, have been lovely enough to plan a bridal shower for me next weekend. Many of the guests are family or friends of my mom's, but the few people still left in Houston are invited as well (although I must say that none of them have RSVP'ed to sissy - harumph).
One of my other bridesmaids "K" recently reminded me that one my greatest fears will soon come to fruition. Since we were sophomores in college, K has had a plot to embarrass me at my bridal shower, which really goes back to the first time we watched Pulp Fiction. For whatever reason, K thinks it would be hilarious to have me open her gift at the bridal shower, in front of my grandma (which is an integral part of her comedy scenario). Inside the pretty white paper and ribbons would be a ball gag.
"She can't really want to do that," is what you're thinking. No, she can, and I am now terrified that she will. Although she is in California and can't come to the shower, my sister has received a package in the mail for the shower. She thinks I am being difficult because I have refused to open it. I just can't.
Da-dum, da-dum, da-dum.