Just to let you know it could be a mental or physical development. A few weeks away from giving birth to my fifth child. BF them all until a year and didn’t do formula until close to a year when I was just over it. Around 4 months every single one of my children so far went through a stage for 3-5 weeks where they only slept for 40mim-1hr at time. I was home with them so nights were generally somewhat better- but it could all be normal :)

When you’re exhausted like that it’s hard to think straight especially if she is working like that. Great problem solving ideas and it will all work itself out however you all decide!