What would it be like discovering you've married your own sibling?

This Brazilian woman has a shocking disovering; she finds out her husband of 7 years is really her brother. Both of these siblings were abandoned by their mother at a very young age. I wonder how they must've processed all that upon such a discovering. Can you imagine starting going out on a couple dates, progressing to girlfriend and boyfriend, falling in love, engagement, marriage for several years; only to find out it's your own brother/sister. What must a discover like that feel like?

This is the link:

https://time.com/3099020/radio-globo-adriana-leandro-brother-husband/

What would it be like discovering you've married your own sibling?
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