Hold on tight online daters, because you're about to hear that your WORST TINDER-RELATED NIGHTMARE EVER.
A woman matched with a man she thought looked nice enough on the dating app, and started engaging in some pleasant flirting, before finding out he was her long lost BROTHER.
Erik de Vries, now aged 24, was separated from sister Josephine Egberts, who's 22, 16 years ago. Despite previous attempts at tracking her down, Erik had no luck and had given up hope of ever being reunited with his long-lost sibling.
But all that changed when Erik moved back to the Netherlands to study, and began swiping away to scout out the local ladies. Little did he know, he'd be right-swiping his own sister.
"The first time I swiped her profile I had absolutely no idea," he told website Mic. "In our first conversation I was actually flirting with her so the conversation was very superficial." Cringe.
But as conversation evolved from pleasantries to actual information about one another's lives, alarm bells started to go off in Erik's head. Explaining what happened, he said:
"In our next conversation, I started to get some clues and figured she might actually be my sister. This kind of shocked me, so I decided not to contact her for a few days."
But not able to hold back anymore, he finally confronted Josephine about his (pretty alarming) suspicions. Luckily she didn't run for the hills, assuming her Tinder match had some kind of penchant for incest, but instead began exchanging stories about their pasts, which obviously matched up.
Since then, the siblings have reunited. Speaking to a dating review site from the Netherlands, Dating site Kiezen, Josephine said:
"When I saw him, it was suddenly very clear. It was so special to see my own blood brother again after 16 years."
Well let's just all be thankful they didn't realize their shared genetics on a first date, right?
This article originally appeared on Cosmopolitan.com. Minor edits have been made by the Cosmo.ph editors.