Is OTHER wrong in the post ? POST : My sister and I are both adults in our 20's. She has a habit of bringing into conversations extremely cutting and sensitive things whenever we have small disagreements. These disagreements range from the trivial (like, ordering food or watching something on TV) to *any* social or political issue. I make sure that I never insult someone because of a disagreement and I always convey my views with logic, but if it happens to hit some magical amorphous trigger she replies with insults that she *knows* hurt me. As an example, the last time we were together a specific political subject was brought up, and because I disagreed with her stance she told me I sounded like I was going crazy or schizophrenic. She knows this would hurt me because I suffer from anxiety and was diagnosed with OCD when I was a child which led to some awkward moments in my childhood (giving me an almost Pavlovian response to being called crazy). I know she knows all of this, and I explained to her that she shouldn't insult me because we have differing views. Later in the day, a disagreement during a card game ensued (over something silly because they were reading the card question too slow to make sense of like one word every 5 seconds), and she made the same insult when she saw I was mildly frustrated (I think she said I was "having an episode" or a "crazy episode" or something). 

Anyway, I absolutely can't stand being treated like garbage by my own sibling so I decided that the next time she would insult me I would respond in kind. When she insulted me, I told her that what she said was insulting and that I would be insulting her as well. I think laid out the ol' treasure trove of sibling wisdom that I've accumulated since childhood, ensuring that they hit her sensitive areas just like she hits mine. A sort of insult *game theory*, if you will. Well, the thing is that I think it actually worked. After that incident I did notice that she refrained from insulting me over the next couple days. But I can't help but feel like an asshole for doing this.

See I just feel like my options are limited. I can do nothing and take the insults and let her walk all over me, I can cut her out of my life completely (which I don't want to do), or I can respond eye-for-an-eye. So am I an asshole in this scenario? We only see each other 3 or 4 times a year, yet I'm honestly more personally attacked in those days than in all the other days of the year combined.