Her response was she will leave tomorrow morning. Today, she went to target. I am confused.
You can huff, and you can puff, but you can't blow her out of your house! I agree with Ginger that the simplest thing would've been enforcing your boundaries, and with Butterfly that if you've decided to give up on living together you should consider that you and your ex's are high-conflict, so choose a safe place like therapy or mediation to work out a timeline, along with temporary custody and support arrangements. I suspect the custody% you can handle would be mostly be determined by your job, and the support you owe (to help her live separately) is then a straight website calculation. Matching your custody schedule with the custody of your son may be a bone of contention, and it's worth asking your attorney about your rights. I don't know anyone with two sets of rotating kids to know what courts commonly agree to in such situations.