Man I'm sorry to read this. My parents just finalized their divorce last month. It's been hard on us all. They'd made it 4 months from 30 years.
I hope it all becomes peaceful for you and your family. Only advice I can give, as a now kid of divorced parents... If you have kids/grandkids possible, get along if possible, it tears them apart to see their parents/grandparents not being able to stand each other. I wish you the brightest future.