Originally Posted by ThunderBalls

I dated and lived with this girl about 10 years ago, things didnt work out but we have been friends ever since. A few months ago I met her sister for the first time and we have seen each other a few times. Now my ex is giving me all kinds of shit about it, telling me to stay away from her sister and I'm an asshole for even thinking about it. Am I wrong here? My ex girlfriend is now married, we are just friends so what the hell is her problem with it?