NEED TO KNOW

A groom's sister upstaged the couple by revealing her pregnancy to everyone at their wedding

The bride called the move "f----- up" and said it became the "main point in the night," stealing attention away from her and the groom

Redditors agreed that the pregnancy reveal was "totally rude"

A woman stole her brother and his wife's spotlight by revealing her pregnancy news at their wedding.

In a post on Reddit's "Wedding Shaming" forum labeled "Monster-in-Law," the groom's wife, 26, vented about her recent wedding, where her sister-in-law, 30, took center stage by revealing her pregnancy to everyone throughout the day.

"They don’t even know how f----- up that was," the bride wrote.

Although the woman has experienced her husband's sister's "narcissism" in the past, she as

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