I don't know where to post this but

What can I do about my mom's boyfriend installing a camera outside my sister's bedroom pointing to her door? She's only 14

I'm not going into detail but it's very bad how he treats my family and I've tried everything but nobody is listening to me social services dismisses it and all

She just sent me a picture of the camera and it makes me so angry 😠

I need your help please what do I do

That's invasion of privacy