AITA for ending our family trip early after my sister used me as a free babysitter?

My sister laughed and said, "You are not a guest. You came as a babysitter to the house you paid for." I just smiled, waited for everyone to fall asleep, and packed my bag. Once I was on the road, I deactivated their access. Their "vacation" ended right there. ---------------🦦Otter Stories🦦--------------- #reddit #stories #redditstories