If you're closely blood related, then I wouldn't go for it. If you're only slightly blood related, then it really doesn't matter. Many of us are related (some would say all of us are, if we're all descended from Adam and Eve), but it's not close enough to matter. I mean, I'm technically blood related to a guy I went to high school with, but it's like our great-grandmothers were cousins, which is far enough apart that it wouldn't have been a no-no if we'd gotten together.
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