3 room mates. #1 room mate takes care of boyfriends dog most of the time but has an agreement with other room mates to watch the dog when room mate #1 is working and all are in agreement that it's ok for the dog to be in the apartment even though the management doesn't allow it(RM#3's boyfriend is the manager!). On this day, RM#1 is working and arranged for RM#3 to sit the dog, RM#2 leaves her laptop on the coffee table, RM#3 who is sitting the dog that day puts her cup of water on the table next to RM#2's laptop. Dog is known to jump on furniture. Dog was let out to roam the apartment by RM#3. Dog knocks over water, destroys $1800 Mac Book. Room mates #2 and #3 gang up on RM#1 and tell her she needs to pay for a new laptop for RM#2.

Who is responsible for the laptop damage?