I didn't know CPS would take my sister's kids too

I called CPS on my sister. My intention was to get her foster kids removed, not her actual kids. My sister has 2 kids and was fostering two other kids and she was being absolutely horrible to them. The kids were brother and sister and the brother was 14 and sister was 7. My sister at first was just emotionally abusive. But then the 7 year old hit my nieces and my sister was gonna punish her with a belt in front of everyone but the oldest brother begged her not to so she just punished him instead in place of his sister. She had her husband hit him with a belt and then ripped his shirt off. Actually ripped it and he was hit with the metal part of the belt creating marks on his back. I asked my cousin what to do and she said I should call CPS. So I did. When cps saw the state the foster kids were in they took all her kids. I didn't think they would take all her kids. The cousin who told me to told my sister and now she hates me and my parents are pissed at me. I just wanted to help the foster kids..