If your father impregnated your older sister and had a child then that girl would be both sister and mother...
What is so hard to understand?? Clearly this forum is populated by idiots..
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No because then that would make her your mother.
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And still your sister..
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It would make a half sister.
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Again... Still sister, regardless if half or not.
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Ok, you got me. Still should have specified though.
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Maybe I should of, look, I'm not arguing with you ok? I have no problem with you, just the other guy, acting high and mighty.
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NEVA GONNA GIVE YOU UP, NEVA GONNALET YOU DOWN
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She'd only be your mother. By biological law, if your father impregnated his daughter, then she's not your sister, because you two were not spewn forth from the same vagina.