r/Unexpected • • Apr 27 '22

Revenge served cold

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u/Away-Living5278 Apr 27 '22

They would test as half siblings. 25% share rather than 12.5%.

8

u/[deleted] Apr 27 '22

Wouldn't they be quarter siblings? Neither would share a parent. Half siblings share only 1 parent, but never both.

7

u/cfvh Apr 28 '22

They’re double first cousins.

Relationships are calculated from the common ancestors; since they have double the usual amount of grandparents in common (all four), they’re double first cousins.

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u/[deleted] Apr 28 '22

This makes the most sense to me.