Dear animalloer1994:
It’s a shame you’ve been living with these abusive people, and for so long! You need to be out of there as soon as possible, today, the next day- ASAP.
Once you don’t live with them, and once you decide if you ever want to see the mother and her daughters again- at all, and if so, under circumstances where they will not mistreat you- then your anger will weaken.
And once you live away, you can get a dog and.. keep him/ her.
anita