Flirting with a sibling doesn't even break the Top 100 grossest things happening on Tinder right now.

If you love your sister so much, why don't you marry her? Haha- OH. WOW.
(photo via Thinkstock)

Josephine Egberts and Erik de Vries were separated in 1999 when their parents split up. One went to Belgium with Dad, one went with Mom to The Netherlands. They had given up searching for each other years ago.

Then came Tinder. Erik, at the age of 24, moved to The Netherlands for school, and in his off time started swiping right on hot girls in his area. He started flirting with a particular match he thought was cute, and the more they talked about their past with each other, the more it became apparent: they were brother and sister.

Sources: Jezebel | Mic