How to deal with a manipulative mother-in-law?

I am brought up in a middle class family where both my parents were working. I am the elder sister and I have a younger brother. Since childhood i feel that my mother has given more time and efforts towards my brother. When he asks something he gets it and when I ask I'm told that it's not required. My mother pretends that she treats both of us equal but i can feel the difference. I'm currently married with a 4 year old kid. My husband is very loving and we have a happy family. My issue now begins when my mother comes to stay/visit us. She begins pointing faults and imposing decisions on us. She does that same with my husband and he doesn't like it either. My mother wants to prove herself right even if she is wrong and will never accept her faults. She is interfering with my child's upbringing too. She will never ever behave like that with my brother. I won't deny the fact that she comes to help when I need since I have no inlaws but just because she knows that we need her she will try to dominate over us. One example is that when my child was 10 months i got a potty seat and she never let me put my kid on it saying that kid is too young and because of this my kid never sat in toilet till he turned 4 years. Another is that she used to feed my son only biscuits all the time even when I used to oppose. Also, once she fed my son ice cream when he was 1 year old and my child developed fever next day and she put blame on me saying I took him our for walk in the evening hence my child got fever. When I used silicon brush to brush my kids teeth she stopped me saying there's no need to brush before 1 month when i objected and continued doing it she blamed .e whenever my kid cried saying that his gums are hurting because you brushed his teeth. Many more such incidents where she puts blame on me and tries to prove me wrong She will almost daily try n tell me that my husband is blaming her for groceries getting over/ equipment not working etc which I know my husband does not (he is very kind hearted ) and she just keeps all this misunderstanding in her head. Many times I've clarified by talking to both of them together. Now, my husband is going out of town and again my mother will be coming. I'm fed-up of these fights n arguments but when in emergency i have to rely on her but she takes full advantage of the fact that I need her. I can't take this anymore and its affecting my mental health

How to deal with a manipulative, interfering mother-in-law? My husband and father-in-law don't believe that my mother-in-law is capable of doing some things that is affecting me and I can't prove it. This behaviour is affecting our marriage.

I have been married for one year. My mother in law has no respect in her talking towards me. She expects me to do all the household things and she doesn't want her daughter to do any kitchen works. Most of the time I feel like she made her son marry me just to do household things. I don't need any appreciation but I can't bear her disrespectful words. And her cunning character and lies. What can I do in such situations

My mother in law has been exploiting us by making us do all her chores work n behaves badly rudely n always sends hidden messages making herself a victim n making us feel guilt since few months my sister in law has asked her not to talk to us as she does not like us and my mom in law has stopped talking to us since more than a month whereas my sis in law does not live together n is bitter n jealous if us how do we initiate conversations with my mother in law we are worried about her but we are afraid if her temper n she constantly fights with us ?