AITAH for not inviting my sister to my wedding bc she always "jokes" about sleeping with my fiancé?

Bride Bars Sister From Wedding After She Keeps Hitting On The Groom Through “Playful” Jokes

Weddings should be all about love, white dresses, and happy memories. You expect champagne toasts, flower decorations, and maybe that one emotional aunt crying during the vows. But sometimes, the biggest stress isn’t the guest list or the cake flavor — it’s your own family.

In today’s story, the bride-to-be faced shocking family drama. While planning her dream day, she found herself in a very uncomfortable situation. Her older sister crossed serious boundaries with her fiancé, making things tense and awkward. After trying to stay calm for as long as she could, the bride finally had enough.

She made the tough decision to uninvite her sister from the wedding. But instead of support, the rest of the family turned against her. Now she’s stuck between bridal stress and toxic family relationships, wondering if she made the right choice.

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This real-life situation raises important questions about relationship boundaries, wedding planning advice, and how to handle family drama before your big day.

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It’s one thing for a sibling to joke around, but when the subject of their jokes starts to touch on something that makes you happy, it can feel more unsettling than funny

The author is planning a small, relaxed wedding, but faces ongoing inappropriate flirtation from her older sister toward her fiancé

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The rest of the family accused her of overreacting, but she remained firm on it despite her family saying the sister was only “joking”

The Original Poster (OP) shared a deeply troubling story about dealing with a toxic sibling right before her wedding. Her older sister had a long history of inappropriate behavior toward the OP’s fiancé. It started with strange, uncomfortable jokes — like saying she would let him “ruin her life” or even joking that she “called dibs” on him if her sister died first.

At first, these red flag comments were dismissed as harmless jokes, but they always made the OP feel uneasy. Things got worse during a family visit when the OP stepped out of the room for a moment. That’s when she overheard something shocking: her sister was telling the fiancé that if he was having doubts about the wedding, she was available.

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That was the final straw. The OP immediately confronted her sister, called her behavior disgusting, and uninvited her from the wedding on the spot.

The fiancé had always seemed uncomfortable with the sister’s comments. He didn’t flirt back, but he also didn’t always shut her down completely — likely to avoid creating family drama.

But the real heartbreak came after the confrontation. The sister cried to their mother, and soon the whole family turned against the bride. They said the sister is just “naturally flirty” and accused the OP of being dramatic, uptight, and even cruel for cutting off a family member before her big day.

This painful story highlights the emotional toll of setting boundaries with toxic family members. It also shows how family manipulation can ruin what should be the happiest time of your life. If you’re going through something similar, remember: protecting your peace during wedding planning is not selfish — it’s essential.

Image credits: Julia Taubitz (not the actual photo)
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According to Budget and the Bees, a joke becomes toxic when it’s no longer funny for everyone—especially the person it’s aimed at. They warn that so-called jokes can hide emotional abuse and passive-aggressive behavior. Often, when someone gets hurt and speaks up, they’re brushed off as being “too sensitive.” This is a classic way toxic people avoid taking responsibility.

Your Tango also explains how toxic family dynamics often fly under the radar. Many people struggle to recognize dysfunction, especially when it’s been normalized for years. A major red flag? When family members deny their wrongdoings or shift blame the moment you bring up your hurt feelings. Instead of saying sorry, they criticize your tone or say “now isn’t the right time.” This kind of gaslighting leaves you feeling invisible and emotionally drained.

As for wedding guest lists, Bride and Groom Direct makes it clear: it’s completely okay to uninvite someone from your wedding if they’ve been toxic or caused drama that can’t be fixed in time. Your wedding day should be filled with love, not stress and fear of conflict.

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In the OP’s story, most people online agreed — her sister’s behavior went way beyond harmless flirting. Netizens pointed out that the sister wasn’t joking; she was actively trying to sabotage the relationship.

So, what do you think? Was the OP right to set firm boundaries and uninvite her sister from the wedding? Or do you think she overreacted?

We’d love to hear your opinion. Drop a comment below and join the conversation about protecting your peace, setting emotional boundaries, and dealing with toxic family members during major life events.

Netizens applauded her for uninviting her sister and insisted that it was her sister who was a bully and who was masking her real intentions behind those “jokes”

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