I know here in my state there has to be a primary even if 50/50. Reason is for school zoning and such based on address.
Don't underestimate the comprehension of your 10 year old. In my case D5 and D7 are pretty aware and understanding of what is going on. Key is that while they can know it wasn't your decision be sure to not villainize W. she will always be heir mom and how you handle it will set how the kids will and how they will remember it forever.
34, xw33 M-10, T-18 2D (8 and 5) Ilybinilwy-1/16 EA/PA- 7/15-present (with my former best friend) Trial apartment-2/16 (also when she considers us separated) W moved out-8/16 W Filed 11/21/16 D final 1/30/17