My mother treats me very differently when I have a sister at home and does not want me. ? I hate them?

My sister works 6 days a week and only has Mondays off. She took 3 days off last week and started complaining about me all the time at home. From cleaning the house to the food I eat. My mother suddenly started taking her side and started hating me. She bought me a pineapple last week and everyone ate it nicely without me saying anything and then today she asked me if I had money while ı was eating that pineapple. I was shocked because I didn't expect this. My mother always acts like this towards me, I noticed that when I'm alone at home she pretends to love me. When my sister or father comes home she suddenly changes and starts complaining about me.

My mother treats me very differently when I have a sister at home and does not want me. ? I hate them?
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