I recently ruined a relationship after we moved in together. She was someone I was convinced I would marry, as we had all the plans to do so. I couldn't handle her 9 year old son's complete lack of discipline and terrible behavior as a result. He even acted immature and well below his age, which I think is the result of no consequences for his actions. It's hard to accept that I ended the relationship with someone I was totally crazy about, just because of their kid.