My mother in law tried everything she could to break me mentally,1-2 years after my marriage i found my?

in laws financial condition wasn't good and they all dependended on my husband's money.Earlier they showed off to extremes but when my husband changed a job and in between got a gap of abut a year financial conditions couldn't be hidden from me.BUt my MIL made me work like a slave and for this she always knew how to keep her son her side. Now things have changed as we have a baby and moved to another country, but she still blackmails my husband emotionally. She calls him when he is not at home, or he calls them when he is not at home, and she cries and always lets him know that her health is soo down,she wants him to do what a dad is expected to do to his kids, to her daughter that is my Sis in law though now she is married, me and my kid is no where in her world, but she knows her son listens to her so she deals with him. It's been ages i have called her up or she has called me up.What i don't understand is..........