<human>: Can you condense the text into a few key points?

So this girl i'm talking to (I'm 27, she's 22) texts me out of the blue and says she "found out I hit on her sister and this other chick" (both of whom I've never met).  I tell her I have know idea what she's talking about or how I would even know them, her reply was that her sister said it happened recently.  
  Later she sends me a message saying she was just giving me shit and thinks its really funny.
  I respond that that was completely insane.

More info: We've known each other for about 6 months now but have only recently started "talking".  She's kind of insecure and weird (I like the weird part but not the insecure part).  She is a virgin, but i'm no player.  She spent the night less than a week ago, we fooled around a little, nothing major.  I do really like her, but this really freaked me out; is this just a deranged sense of humor and/or walking material?
<bot>: This girl I made-out+ with sent me some weird text and I was a little freaked out HELP?!?