WARNING: "Game of Thrones" spoilers ahead!

Jon Snow and Daenerys Targaryen may have been in the dark about their relationship during their steamy sex scene on Sunday's season seven finale of "Game of Thrones," but stars Kit Harington and Emilia Clarke were just as creeped out as the rest of us. 

The pair opened up about the big finale twist -- that Jon's real name is Aegon Targaryen, making him the heir to the Iron Throne and Dany's nephew -- in special behind-the-scenes commentary for HBO. 

"For us, as actors, it's just weird," Clarke shared. "The reality of what they are to each other, I don't know how that's going to... I think [gags] might be the reaction."

"I think they both know it's wrong. I think they both know it's going to cause problems," Harington added. "But it's that thing, when you suddenly feel that deeply about someone and you go through those events together, it's like a runaway train. You can't stop it from happening."

Isaac Hempstead-Wright, whose character, Bran, had the unfortunate task of revealing the familial connection in voice-over during Jon and Dany's sex scene, is concerned with how this new piece of information will tear the show apart. 

Read more at CBSNews.com.