So, here's what happened. I was playing a game with Friend 1 and Friend 2. Friend 1 finds two rare items while fishing (both the same item), and Friend 2 is INSTANTLY asking for them to give to an NPC. Friend 1 is saying no, but Friend 2 is repeating her question and repeatedly getting louder. Friend 1 begins saying "well what do you have to offer?", to which Friend 2 begins repeating her question and calling Friend 1 an asshole. I chime in, calling the entire situation retarded, and that's that (keep this in mind, and also note Friend 2 uses the word "retard" much more offensively than I do). I admit, I personally thought that Friend 2 was beginning to get quite childish at this point, but I was simply joking with my "retarded" comment.
So later on, when I'm afk, Friend 1 sneaks over and gives me one of the items. Friend 1 mentions it, and Friend 2 instantly calls us both assholes and asks me for the item. I then say "Well what do you have to offer?", because I honestly have no use for the item and I'm curious as to what she even has in equal value. Friend 2 repeats her question with no response to my original response, and I say "I deny your offer." 
Friend 2 instantly gets off the call and off the game, calling us cunts in the discord chat.
I admit, Friend 1 was being a bit of a dick by the end of it, but Friend 2 imo was being very childish over the whole thing.
After a bit, Friend 2 and I are talking via the chat. Friend 2 claims that BOTH Friend 1 and I were trolling and mocking her, that Friend 1 never said no to her, that she DID infact offer things for the item (nothing of which was of equal value from what she listed off), and finally, to top it all off, she claimed that I called HER retarded MULTIPLE TIMES. And that she asked me to stop multiple times.
by the end she said "you think i care about a video game NPC lol"

So, Reddit, AITA? I sincerely want to know if I'm just overreacting or not.