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I taunted my little sister her entire life about the fact that she looked nothing like me or our father.
I always made ’you’re adopted’ jokes, and she’d respond, “Perfect, that means I’m not actually related to you.”
My parents kind of frowned upon it because they thought it was ’mean.’
A couple of years ago, I accidentally found out that my sister was actually the product of a short-lived affair. My dad accepted her as his own, and my parents kept it a secret from everyone. They finally told her the truth last year. I still make ’maybe you’re adopted’ jokes, but now they’re 100 times funnier.