You were Kristen Birch's friend- her *best friend*, if you will.
One night, when you and Kristen were supposed to have a sleepover, she realized she forgot to run an errand earlier in the day.
She explained to you that she couldn't bring you with, and that if and when you needed something, you could ask her older brother, Trent, to help.
Kristen had already left, so..
*What do you do now*?