AITA for my brother’s childish “pranks” driving our sister away—and then getting mad when her fiancé stood up to him?
My brother Mike has a long history of bullying our sister Kelly and being treated like the golden child by our parents. After he tried to humiliate her at Christmas, her fiancé Jake stepped in—and now Kelly hasn’t been home since. With their wedding coming up, the family is still fractured.
I’m 37F and my brother Mike is 35M—he’s always been babied by mum and dad and acts entitled. Growing up he was the “golden boy”: promising at rugby but lacking the work ethic to follow through, yet forgiven for a lot. He bullied others at school and, worse, tormented our younger sister Kelly (31F) at home with humiliating “pranks.” The family shrugged it off as sibling nonsense, even when he pulled her dress up at a wedding when she was 15.
I watched Mike make Kelly’s life small for years while our parents excused him. She chose to go to Imperial in London instead of St Andrews so she could get distance from home, and she only came back rarely—then met Jake, who treats her wonderfully. When Mike tried to humiliate her at her first Christmas with Jake, Jake intervened and Kelly stopped coming home after that.
Kelly had dreamed of St Andrews since childhood, but when the time came she chose Imperial College London so she could put distance between herself and home; after graduating she stayed in southern England for work. Six years ago she met Jake (30M), and they fell hard—she gushed to me the day they met. Jake is tall, trained in martial arts since age four, and protective in a way that complements Kelly’s happiness.
"He would do anything to embarrass her—even pulling her dress up at a wedding when she was 15."
At her first Christmas back after meeting Jake, Mike tried one of his old stunts—preparing to pour a bowl of water over Kelly. Jake stepped between them and told Mike to stop. Mike dismissed it as a prank; Jake warned him that if he tried it again he’d retaliate physically. Kelly and Jake left an hour later, and Kelly hasn’t been home since.
"If he 'pranked' Kelly one more time, he would 'prank' Jake by putting his foot up his arse and his fist down his throat."
After that incident Mike, mum, and dad had issues with Jake. They tried to play the water stunt off as harmless, but Jake wouldn’t let it stand. The result was a split: Kelly stopped coming home, my parents felt betrayed and accused her of abandoning the family, and family gatherings became tense. Now Kelly and Jake are getting married, and that history is still a sore point.
🏠 The Aftermath
Kelly hasn't returned home regularly—only for holidays like Christmas and the narrator’s wedding—and after the water-incident she stopped coming back at all. Mum and dad are upset, viewing her distance as abandonment, while Mike feels justified or unchallenged by parental indulgence.
At family events, the dynamic shifted: guests and relatives preferred getting to know Jake, and Mike’s attempts to be the center of attention backfired. The family is fractured—Kelly and Jake have built their life together away from home, and old patterns of favoritism and enabling remain unresolved.
Concrete consequences include long-term estrangement from Kelly, lingering resentment toward Jake from Mike and the parents, and a family that hasn’t fully reconciled over what counts as harmless fun versus abusive behavior.
"He kept humiliating her and we pretended it was just siblings being siblings."
I feel sad that Kelly chose distance to protect herself, and frustrated that mum and dad’s favoritism let Mike get away with harmful behavior for so long. With the wedding on the horizon, those tensions are still simmering under the surface.
💭 Emotional Reflection
This story is about family dynamics and the long harm caused by excusing mean behaviour. Mike’s “pranks” crossed lines that left Kelly feeling unsafe, and parental indulgence normalized that harm. Jake’s physical warning was extreme in wording, but it came from a place of protecting someone he loves—and it changed the family’s equilibrium.
There’s no neat villain here: parents enabled a son, a sister chose distance to preserve herself, and a partner defended his fiancée in a way the family found threatening. The heart of the problem is mismatched expectations about what counts as acceptable behaviour and who the parents will hold accountable.
Reconciliation would require parents to acknowledge past enabling, Mike to own his actions, and the family to prioritize Kelly’s safety and dignity over maintaining an outdated “golden child” narrative. Until that happens, tensions are likely to continue—even at the wedding.
Here’s how the community might see it:
“Being the ‘funny’ sibling doesn’t excuse humiliation—parents should’ve stepped in years ago.”
“Jake protected his partner. If that’s why she never went back, I get it—safety first.”
“Sad that the family couldn’t see how hurtful Mike was. Weddings shouldn’t paper over real wounds.”
Reactions will likely split between defending family ties and validating Kelly’s choice to distance herself after repeated mistreatment.
🌱 Final Thoughts
Favoritism and minimization of harm can push people away for good. Kelly’s decision to build a life away from home and to stay with someone who treats her well is understandable given the history described.
If the family wants healing, it will take honest accountability from Mike and willingness from mum and dad to stop excusing bad behaviour. Otherwise, estrangement may continue despite big events like a wedding.
What do you think?
Should the family insist on reconciliation before the wedding, or respect Kelly and Jake’s boundaries and let them decide what contact looks like? Share your thoughts below 👇
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