why nag?

I don't really understand why my ex-wife is still pesting me up to now when in fact she can choose not to even see nor talk to me forever...
Before I was typing this blog, I was talking with my youngest brother who have a very naughty yet creative mind. He told me that maybe my ex-wife is still in love with me hahaha! So anyway, we cross that possibility out. On second thought, even if she is still in love with me, I will NEVER get back with her again. Living with her for 4 years was a complete hell life. For the last 2 years of our marriage, I was suffering so much that deprivation was not even a term to call it. Though I must admit that our first 2 years of marriage was sweet and uncomparable...

I told my brother that maybe my ex-wife feels that I'm too kind for her to shout and nag at. I don't like the way she talks, even when she's not shouting...It makes me feel like she's doubting me on something I don't even know...

The girl I married and the ex-wife I know right now is not the same anymore.
The girl I married doesn't smoke, drinks occasionally, talks softly, doesn't curse, doesn't hurt and don't nag.
The ex-wife I know now smokes a lot, drinks a lot (would you imagine we had dinner at Gerry's Grill the other night, she ordered beer tower and finished it all alone?!and she's 6 months pregnant!), talks like shouting, cursing is like a habit, hurts me with pinches and punches, and nags all the time!