Child endangerment

Tasha

Okay mamas I need some advice. My sister on law (to be) has a 3 month old little boy. She and her boyfriend are about as smart as a pile of rocks when it comes to parenting and the poor baby has been put in dangerous situations multiple times. Shes been given advice 100 times 100 different ways but she doesn't listen to anything and I'm getting really tired of fearing for that poor baby. My fiance and his parents are both coddling her because shes the only girl out of 4 kids. I've threatened to call CPS multiple times now and have been told not to, and that "we will deal with it". I'm at a breaking point now and basically want to know, should I call it in myself or get a third party to. I have a few friends that would so it wasn't me, but there needs to be some serious intervention before this poor baby gets hurt.