For many people, the sibling relationship is the longest relationship of their life (as they should still be alive even after the parents pass).

WHY WOULD YOU DO THIS TO THEM? I do mean to yell. This horrifically selfish to split the children so that the siblings would never be together. OMFG. Please do not do this. They will need each other, even at a young age. You take all their stability (parents divorce, 2 homes) and now their siblings?

I wonder if you can effectuate "alone time" with each parent while still having the kids all sleep in the same place--e.g. if the kids are with you Sunday-Weds, one Monday Dad picks kid A from school to do something alone. The next Monday Dad picks kid B up to do something alone. The next Monday, Dad picks kid C up. You do the same thing once a week when kids are with dad. The kid having "solo" time with one parent still sleeps in the same house as the other siblings.

Also, you know your kids. Do what's best for your family! Don't listen to everyone saying mean things. Divorce happens. It's not pleasant, but the fact that you and your ex are working together to find a good system for your kids is great!

Sounds awful for the kids.

But also, it is useful for adults to have time off from parenting . Then when they have the kids, they can focus more fully.