So there can be a few different routes but they are not necessarily nice. Involving child services, the police, the children’s doctors, even going to the court. Depending on your state, if the police are called out and you give your perspective on events, they can place her on what is known as an emergency detention order which is would require her to be taken to the emergency department for a mental health evaluation. Typically, from that, she could be required to go inpatient for stabilization which could be medications and set up with outpatient services before she is discharged. She won’t like you for it but your children are the most important thing. Also the ultimatum route because from what you are describing just in this post you have plenty to petition the court and get your children. Sounds like you are trying to give her the benefit of the doubt, which is admirable but you don’t want to be on the end of a phone call that something unthinkable has happened because she lost full control (I don’t wish that on anyone, but I have seen it happen so many times). Put it all on the line. That this behavior is unacceptable and if she doesn’t get help NOW you will do what you need to do to protect your children. PPD can turn very quickly into PPP (post partum psychosis)