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The OP in the Reddit story is adopted, as the parents couldn't have children. But they eventually gave birth to a sister, who became the center of attention for them, displacing OP from their lives. However, when OP is used to pay for some things at the wedding, she uses that opportunity to get revenge. Which isn't enough for the sister, and she goes after OP's wrath to get a second dose of Karma. 0:00 Story 7:00 Update 1 12:21 Update 2 15:59 Update 3 20:08 Update 4