Call a lawyer get a restraining order then she can be arrested for violating that restraining order. Don’t really on the man that left you to keep the crazy lady away from your kids.
The problem I have with OP is that she didn't get a lawyer involved from the get-go. Those messages were enough to get the law involved. Finding out that Sloane contacted the kids' school was definitely enough to get the law involved. OP is starting to piss me off by not contacting the police, especially since Sloane is escalating. Even the neighbor is telling her to call the police. WHY IS OP REFUSING TO CALL THE POLICE?!
Contact your lawyer take your husband back to court. Present the evidence that the wife is grooming your children with lies to get full custody. He can only have supervised visits. She’s not allowed to come.
‘“I’ll talk to her” yeah cos that worked the first 856 times. If anyone was dealing with this level of crazy every single message screenshot, note, video, and medical report would need to be logged with the police to create an evidence trail and then given to a lawyer.
I think this is every divorced women's nightmare. When my son was little, I had nightmares for years that my ex was going to end up with a women who wanted a ready made family and try to take over my son's life. My stepmother tried to get me to turn against my mom when I was two and was mad for years when I said no I wanted to stay with my mom. Sadly craziness like this really does exist.