Is AUTHOR wrong in the post ? POST : So this past winter break my good friend from college, Caroline, invited me on a 10-day trip to Germany. 

I knew Caroline “studied” in Germany for 3 weeks during summer while she was 15.

We arrive in Germany and she says she’s reconnected with a friend, named Jack, from when she studied there and she asked if I’d be up to meet him. I said sure.

Jack introduced us to a group of his hometown friends, and as the night progressed Caroline begins HEAVILY flirting with one of Jack’s friends, Paul. She’s so into Paul that she’s actively ignoring me/anyone else in the group who tries talk to her. She later hooks up with Paul (while me and Jack try to get some sleep in the bed next to them) on the first night. 

For the rest of the 10 days, Caroline would think up ways to see Paul. Since Paul didn’t have a car, he always came with Jack. So trip basically turned into Caroline making out constantly with Paul while I walked around and did touristy stuff with/got to know Jack. 

I’ll skip a lot of details because this is already long...but basically at the end of the 10 days me and Jack were feeling really close, and while Paul and Caroline were out on the last night, me and Jack hooked up. 

The next morning I told Caroline that I finally sealed the deal with Jack and to my surprise...she FLIPPED out on me, called me an asshole, bitch, slut, etc etc.

Apparently she had this huge crush on Jack during that 3 week program in high school (5 years ago) AND she planned the trip to Germany to see if “he still felt anything” AND that she was only getting with Paul to make Jack jealous, AND that if I really was her good friend I would have been able to tell that it was actually Jack who she liked and not Paul. Basically she was upset I hooked up with Jack and demanded I apologize. 

I refused to apologize, I told her I’d have no way of knowing that, that I had fun with Jack and that  I was creeped out that she planned a trip from the US to Germany JUST to see if her high school crush from 5 years ago liked her back.

It’s been over a month since we came back from the trip and she’s still demanding I apologize for being a “slutty bitch” and “ruining the trip.” I see no reason to, but she’s being so insistent I’m starting to wonder if I’m in the wrong. 
 
AITA for sleeping with Jack?