What should I do with my Mother in a situation like this in Islamic way?
I am a 18 year old boy. I read in college. We are only 3 members in our family me my father and my Mother.My mother had and having some illegal relations with different persons .when was in class seven she left us and went to her illegal partner( she also had some other relations before) but in 6 months that guy took all her money (3-4 lac Taka which was my fathers) and left her so she returned to our family by the sake of her children ( me and my sister) after one from then my sister got married and my mother starts another relationship with another person. After knowing that my father broke relationship with her but she is not willing to leave this place.Its been 2 years that things are going this way. My father is keeping her here only for taking care of me . But she never takes care of me she seems always busy with her illegal partner when ever I got ill she never takes any care of me.she never cooks any thing what I want to eat , she earns equal or little less then my father but she does not bare any of my expenses. She never stops me to do any kinds of bad things . She also offer me to buy her alcohol,weed etc. when ever I try's to say any things to her she keeps saying you can't say any things to me,because I am your mother,if I want to say, you never took any responsibilities of me and you never take any care of me, she says I feeds you my milk and that is enough.Me and my father always wants her to leave us but she is not at all agree to leave this place and she is giving money for her staying to my father so my father stops saying any things to her. She is doing illegal things in front of me so if I try's to stop her will it make me sinner ? And if I ask for my rights from her will make me sinner in Islamic way ? I always try support her in good things for her I always been humiliated from my known ones . I lost all my respects to my mother so often I used to shout on her... and she always curse me... and say even if mother is prostitute son can never talk to mother like this
So please tell me what should I do,I really need help (Islamic way)
Information
1. She does not have any other children
2. The persons she is in relations are mostly married persons
3. She says that she married those persons ( she is not divorced with my father properly, those persons family doesn't know about the relations)
4. My mother and father are not staying in same bed
5. My Father is very much busy with his work he often do not come home for his work and normally he returned home at 9
