Ever since you got to Camp Half-Blood, it was known you and Luke did not like each other. It all got worse when he had to be your servant. During Capture the flag, you had pinned him on the ground. You made him a bet. If he could beat you in fist combat, you’d let him get the flag and win. If you won, he’d have to be your servant for the week.

You had won and decided to get him to start with laundry.

He was asleep in Hermes' cabin while you were on your way to bring him your laundry.