http://www.redditlog.com/snapshots/1399913

Girl gets attracted to another guy. Hamsters her way into polygamy excluding her boyfriend.

/u/putsch80 explains hamstering in the comments.

The fact is she wanted to cheat on you with this guy. So, she internally rationalized that the way to do it is to suddenly have this epiphany that it is ok for her to fuck multiple people because she still loves you and just wants sex from them. She can't just admit that she wants to cheat and not lose you, so she invents a belief system to help her cope with the fact that her desires and reality don't match up. A person who will totally rearrange their mind that way in order to justify doing shitty things is not someone who should be part of your life for any reason.