When a woman's sister-in-law "accidentally" revealed her pregnancy on social media, she had a rather extreme reaction.

The original poster (OP), 26, shared their story on Reddit's AITA and explained that she's currently 10 weeks pregnant. She and her fiancé, 28, told their immediate families early but explicitly stated that they weren't planning on telling anyone else until after she'd reached her first trimester.

However, OP's future sister-in-law shared a photo on Instagram that was a "get ready with me" for a family dinner they'd had the weekend prior. During the video, she "casually indirectly talks about becoming an auntie" and then tagged OP and her fiancé.

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