So for the past 7 years i have been assaulted by my mums father in law i dont like to say that his my step-grandfather cause he means absolutely nothing to me he use to try  grab my ass and boobs and come into my room at night and try and feel me up which i did not like and he would watch me through the bathroom window even tho it would be covered by a curtain he has caused bruises on me as well my mums husband doesnt mean anything to me at all because he used to physically abuse me leave bruises and marks on me the excuse he use to use was she didnt do what she was told which 99.9% of the time i wasnt the one that did anything it was my siblings that did something that i would get in trouble for i have also recently told my grandma and mum about it it got so bad that i had to move out of my mums place but the point is my boyfriend knows about all of this and he wants to put a anonymous police report so my mums father in law gets what he deserves but i dont know what i should do because i want him to put one in because i dont want my little sisters to go through what i went through i dont want them to hurt themselves like i did because of this or anything and im scared that if me or my boyfriend goes tell the cops that either my mum or my bf will get seriously hurt and i dont want that im just really scared what should i do ladies cause this has been doing my head in😖😭 

Ps my mums father in law has threatened to rape me😥