Can I stop my Mother In Law hating me?

Amy says:
My fiance and I met in 2003 when we were teenagers, I was 17 and he was 19. We are now adults I am 28 and he is 30 so its been 11 years. My mother in law has never really liked me in fact she has always hated me. Partly cause my parents are lower class and recovering drug addicts.She has told me numerous times that because of who they are, or were, that she see's me as not good enough for her son. 

My father in law used to always kinda kept her in check. There were occasions when she offered to buy her son a house if he left me or would go long periods of time without speaking to him because he refused to break up with me. In 2010/11 we actually did break up for 10 months because of family pressure and it causing us strain. 

My fiance broke down without me and turned to drugs, I shut down socially and kinda just kept to myself and my family. We got back together cause we honestly we belong together. I got him to get clean which his mother knows. Anyway a few months after he got clean his father became sick and I got pregnant. 

We uprooted and moved back near his family to help them out cause his father had cancer and where we were we had no help or support with a child. I actually dropped out of college and he left a great job. I stayed with his dad during the day while everyone worked and helped out around the house as much as I could. My mother in law was starting to take out her frustration with the whole situation on us.

You gave been incredibly forgiving and tolerant with this truly ghastly woman, and big respect to you for making every effort to win her over. Unfortunately you have failed. If you were going to win her over, you would have done it already.

Unfortunately other people often carry a bucket load of issues that were there long before you ever came along. You are not responsible for any of these issues or another persons inability to be reasonable. In an ideal world, once your Father In Law has passed on, the ideal move would be to rid your marriage of this malign influence for good. However that requires your husband to agree.

At the very least, keep this woman at arm's length - you have wasted enough time already trying to win an approval that will never come.