AITA for refusing to pay a 100$ bill from my Sisters in laws?

A man and his sister rented a large vacation house for their families, including the man’s wife, 1-year-old child, dog, sister, her husband, their two young children (5 and 3), and, for the first week, the sister’s in-laws. The man’s rescue dog is sweet but nervous around strangers; he clearly instructed everyone that she would remain leashed around new people and supervised by him or his wife. On day two, his sister’s mother-in-law (MIL) asked to give the dog a treat, was given explicit safety instructions (get low, move slowly), but immediately ignored them—leaning over and reaching down.

The startled dog jumped up briefly; the man quickly pulled her back and restated the boundary. Two days later, while others were out, the in-laws loudly discussed repairing a broken anklet, implying the dog caused it. No one mentioned it again during their stay. Two weeks after the trip, the sister called saying her in-laws wanted $100 for the repair, claiming the dog did it.

‘AITA for refusing to pay a 100$ bill from my Sisters in laws?’

The dog boundary was clearly explained from the start.

The MIL ignored the instructions despite being warned.

The anklet claim surfaced only after they left.

This dispute combines unclear causation, ignored instructions, delayed communication, and a questionable repair demand into one frustrating package. The man set a clear, reasonable boundary for his nervous rescue dog—leashed and supervised around strangers—and directly instructed the MIL on safe treat-giving. She disregarded both, leaned over the dog, and got a startled jump in response. That single incident is the only link she offers to the broken anklet, yet she also listed multiple other possible causes (trampoline, bumping something) and never raised the issue during their stay.

Waiting two weeks to present a $100 repair bill—after returning home—feels like an after-the-fact shakedown rather than a genuine claim. Even if the dog did contribute (unlikely given the described jump and lack of immediate notice or visible damage), responsibility falls on the adult who ignored explicit safety guidance. The man quickly intervened, restated the boundary, and heard no further complaint at the time.

His refusal to pay is fair: he did not cause the break, did not accept liability, and was never given a chance to address it contemporaneously. The MIL’s upset reaction and attempt to guilt him through the sister suggest entitlement rather than legitimate grievance. He is not the asshole—he protected his pet, followed through on stated rules, and declined an unsubstantiated retroactive demand.

Here’s how people reacted to the post:

The vast majority declared the man NTA, viewing the $100 demand as an unfair shakedown based on shaky evidence and ignored instructions.

Several commenters focused on the MIL’s failure to raise the issue immediately and called the demand suspicious.

A couple of responses kept it concise while firmly supporting the man.

This vacation incident shows how ignored boundaries and delayed claims can sour family relations. The man’s clear dog-safety rules were reasonable; the MIL’s choice to disregard them shifted any resulting risk to her. Waiting weeks to demand $100 for a possibly unrelated repair feels opportunistic rather than honest.

Have you ever had a family member blame your pet (or child) for damage after ignoring your instructions? How did you handle the conversation or cost request? Do you think immediate disclosure matters in shared-liability situations? Share your thoughts or similar stories below!