@aguile12 as stated above, if the two of you can not agree on filing JOINT (since both have to sign the same tax return), then your only choice is filing SEPARATE.
as far as the children go, if you two can't agree on who is going to claim the children (since they lived with both of you for more than 6 months of the year), the IRS has tie-breaker rules.
rule #1 is who they lived with for a larger portion of the year. She wins since the children lived with her for 52 weeks and you for 50 weeks.
just so you have it, if rule #1 was a tie, then rule #2 is who earned the larger amount of money - that is who can claim the children.
if this situation continues for all of 2025, she would file HOH and you would file Married - Filing Separate. She is able to file HOH if she lived apart from you for at least the last 6 months of the tax year.