U
User_43891
Unconfirmed
I don't know of a single nation where marrying or having sex with a step relative is objectionable either culturally or legally.
It's illegal in Canada.
> 2 (1) Subject to subsection (2), persons related by consanguinity (blood), affinity (marriage) or adoption are not prohibited from marrying each other by reason only of their relationship.
> 2 (2) No person shall marry another person if they are related lineally, or as brother or sister or half-brother or half-sister, including by adoption.
So a step-relationship isn't a bad thing UNLESS it's between a step-(grand)parent with a step-(grand)child or between step-siblings.
This also means that full incest between cousins, Aunt/Nephew, and Uncle/Niece is also completely legal.