Is AUTHOR wrong in the post ? POST : I found out my gf of 6 years was cheating on me. She lived with me rent free for 4 years. Additionally, we were about to buy a house before I found out, she put down 10k towards the deposit. 

&amp;#x200B;

After I found out, I bought the house anyways and moved in alone. I've paid her back 4,000 so far, but as more stuff comes to light about our past (including booking a hotel without my knowledge, and telling me she was at her friends place for the weekend), I'm highly inclined to default on the remaining amount.  AITA? 