AITA for using “peanut repellent” to stop my sister from stealing my pretzels?

In a quiet town, a teenage girl’s love for cheese pretzels becomes more than just a craving—it’s a small rebellion against the chaos of her everyday life. Despite the long journeys and the teasing from her younger sister, these pretzels are a rare comfort, a taste of joy she fiercely protects from the one person who should be an ally in her world.

But sibling rivalry turns bitter when her sister’s jealousy and laziness lead to theft, mocking words cutting deeper than the missing snacks. With a mother’s indifference weighing heavily, she’s forced to find a desperate, painful solution to guard her simple happiness, revealing how love and pain are often tangled in the bonds of family.

AITA for using “peanut repellent” to stop my sister from stealing my pretzels?

As renowned psychologist Dr. David Elkin states, “When communication fails repeatedly, individuals often escalate their tactics, moving from verbal confrontation to environmental manipulation to enforce necessary boundaries.”

The core issue here is a severe breakdown in boundary enforcement and family support. The OP, despite taking significant personal effort to acquire a desired item, faced theft, entitlement, and verbal abuse (body-shaming) from her sister, which was implicitly validated by the mother’s dismissive reaction. The OP’s motivation for using the ‘Peanut Repellent’ is rooted in self-preservation and boundary defense, even if the method chosen is manipulative. While the sister’s mild allergy means the risk is low, intentionally leveraging a known health trigger, even as a deterrent, creates an ethical gray area and further erodes trust. The OP’s actions are understandable as a desperate measure when conventional conflict resolution failed, but they prioritize immediate boundary enforcement over honest communication.

Moving forward, the OP should focus on clear, non-deceptive boundary setting, perhaps involving parental or external mediation if the mother remains unhelpful. A constructive approach would be to clearly state that any future theft will result in immediate, documented consequences (e.g., reporting to a school counselor or another trusted adult) rather than resorting to tactics that mimic genuine danger.

REDDIT USERS WERE STUNNED – YOU WON’T BELIEVE SOME OF THESE REACTIONS.

The original poster (OP) is facing persistent theft of her favorite snacks by her younger sister, coupled with body-shaming comments from the sister and a lack of support from their mother. In response to feeling violated and unheard, the OP resorted to deceptive tactics involving a mild allergen to protect her property and establish boundaries.

Is the OP justified in using a deceptive ‘peanut repellent’ tactic to stop her sister from stealing her property and verbally abusing her, or does this action place the sister’s genuine, albeit mild, health risk above ethical considerations of honesty and trust within the family?