AITA for telling my SIL that she obviously hasn’t changed since her school days?

Picture a cozy home, the kind where shoes are neatly lined up at the door, and family ties are tested over a pair of designer heels. Sarah’s 15-year-old daughter, Anna, innocently tries on her stylish sister-in-law Mary’s expensive shoes, sparking a firestorm. Mary, a former school bully turned insurance mogul, unleashes a tirade, reducing Anna to tears. Sarah snaps back, accusing Mary of never shedding her cruel high school ways, but the fallout leaves her wondering: did she go too far?

Sarah’s life with her husband, Tom, and their fashion-loving teen is usually drama-free. Mary, Tom’s sister, has a history of tormenting others, and her sharp tongue hasn’t dulled with success. When Anna’s teenage curiosity meets Mary’s wrath, Sarah’s protective instincts kick in, reviving old wounds from their school days. Was her sharp retort a justified defense or a low blow that stirred up family chaos?

‘AITA for telling my SIL that she obviously hasn’t changed since her school days?’

My husband and I went to school together, and his sister, 'Mary' was a few years above us. Mary was a horrible bully who practically ran the school and made life hell for a lot of girls. It was serious enough that my husband later told me that their parents had to pay teachers and victim's parents a lot of money to keep quiet. Mary has done quite well for herself since school.

She owns a quite big insurance firm which makes her a lot of money. She isn't a particularly nice person now but I've always tolerated her for my husband's sake. Mary came by yesterday to speak to my husband about something. She is very stylish and is always dressed in that immaculate chic style. She wore heels, but as always took them off at our door because we have a shoes off rule.

We have a 15 year old daughter, 'Anna' who is also going through a fashion phase. When Mary was starting to head off we saw her in the hallway trying on Mary's designer heels. Mary demanded she remove them and Anna immediately did and said sorry. I told Anna she shouldn't try on people's things without asking but Mary said a lot more.

She started shouting 'Who the F do you think you are?' and berated Anna for a good few minutes, including saying Anna 'shouldn't touch what she couldn't afford'. Anna burst into tears and ran upstairs. What Anna did was not right, but Mary did not need to cruelly berate her to tears like that.

I said to Mary that what she said was disgusting and that she obviously hasn't changed since the days she tormented people at school. Mary put her shoes back on and left. My husband said the school comment was too far. I don't think it was. I understand why Mary was so angry.

She's always been very protective over her precious clothes and those shoes were not cheap at all. But even so, Anna took them off immediately and apologised. She used a teenage girl's silliness as an excuse to bully and intimidate her. She is a disgusting person and I'm sick of my husband making excuses for her.. AITA?

Sarah’s clash with Mary is less about shoes and more about unresolved power dynamics. Mary’s over-the-top reaction to Anna’s innocent mistake mirrors her past bullying, as Sarah pointed out. “Bullies often use shame to control others,” says Dr. Izzy Kalman, a bullying expert, in a Psychology Today article (source). Mary’s harsh words, like telling Anna she “shouldn’t touch what she couldn’t afford,” were designed to humiliate, not correct.

This incident taps into a broader issue: how past behaviors resurface in family conflicts. A 2022 study from the Journal of Family Issues (source) found that 55% of family disputes involve unresolved grudges, often from adolescence. Mary’s outburst wasn’t just about shoes—it was a power play. Sarah’s retort, while pointed, called out a pattern, though referencing high school risked escalating the drama.

Dr. Kalman suggests addressing bullying calmly: “Say, ‘That was too harsh; let’s keep this respectful.’” Sarah could’ve intervened sooner, but her defense of Anna was warranted.

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Here’s the feedback from the Reddit community:

Reddit brought the heat with opinions as fiery as Mary’s tirade. Here’s what the community had to say:

Otherwise_Window - NTA for that. Absolutely TA for letting it get that far. How do you let someone abuse your child like that in your presence? How did she get more than one sentence into that rant without you shouting her down and telling her that under no circumstances will she speak to your daughter like that?. Do better.

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DoctorDoctorDeath - ESH:. Mary clearly was an AH for unloading on your daughter like that.. You and your husband on the other hand LET her berate your daughter. Your daughter is 15 and still touches other peoples stuff without asking first? Apparently there is still a need for parenting and guidance here. Which is also on you.

PhantomStrangeSolitu - Didn’t you try to stop Mary from berating your daughter?

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SpectacularTurtle - INFO: What were you going for the 'good few minutes' your child was being screamed at? Why would you just stand there watching that happen and do nothing about it?

maddylime - Esh Anna- she's 15 not 7. She knows better. Also, has she never met your SIL? What did she think was going to happen?. Sil- people don't really change...they can try to behave better though, and she clearly doesn't try. OP- the good couple of minutes wait to stop the verbal abuse.

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You could have immediately sent Anna away from the horrible SIL. Husband- really? Standing up for a bully? Play stupid games get stupid prizes. What did he expect you to do when SIL screamed at his kid like that?. I stand by my judgement, everybody sucks.

AppalachianEnvy - NTA. Why did you and your husband allow her to berate your daughter for several minutes? You should have shut that s**t down immediately.

Fair_Butterscotch_57 - ESH. Anna’s phase doesn’t excuse her behavior, and she’s old enough to know that’s not good behavior. You/husband should have taught her that by now. You/your husband for letting a grown woman scream at your daughter for minutes and only _after_ the damage is done trying to “stick up for her”.

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Also potentially for not teaching your daughter to respect others’ things. Mary for overreacting. Unless she damaged the shoes, an apology and stern reprimand should have been enough. The comments she made were actually bullying tactics, and I could understand why you related it back.

happybanana134 - ESH. Mary was out of line. But Anna is 15, old enough to know better and I don't know many people who'd not be angry if a teenager tried on their expensive shoes. Mary isn't wrong- don't touch what you can't afford to replace. The school comment wasn't relevant or helpful. Focus on the issue at hand - tell Mary that Anna had apologised, reassure it won't happen again and tell her she's crossed the line.

alargewithcheese - NTA. Maybe it's just me, but trying on your aunts shoes doesn't seem like a huge overstep to me at all. Maybe it's cultural, but my aunt basically begged me to put on her stuff because it was fun. Not defending using others stuff without asking, I just think it's veeery innocent and not at all a big deal.

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plm56 - NTA. You told the truth, and Mary had no place interfering when you were already addressing it. Tell your husband that his sister is no longer welcome at your house until she offers your daughter an apology.

These Redditors had strong feelings, but do their judgments hold up in the real world? One thing’s clear: Mary’s outburst didn’t win her any fans.

Sarah’s showdown with Mary was like a spark igniting a powder keg of old grudges. Anna’s teenage slip-up didn’t deserve a verbal thrashing, and Sarah’s clapback about Mary’s bullying past hit a nerve. Was Sarah wrong to drag up high school, or was Mary’s cruelty the real issue? And why didn’t Tom step in to defend his daughter? If you were Sarah, would you have called out Mary’s past or shut her down another way? Drop your thoughts below and let’s unravel this family drama!

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