SM, you said you don't want to talk about divorce any more so I'll throw in my experience with custody and you can skip right over it if you wish.
In my state (Virginia), it's very typical for both parents to get 50% legal custody. Legal custody basically means who gets to make decisions for the kids. My attorney explained to me that one parent is granted 100% legal custody only if the other can be proven to be an unfit parent. Note that for all practical purposes, 51% legal custody is the same as 100%.
My W and I split physical custody 50/50 for more than a year, then circumstances changed and I got them every other weekend (by mutual agreement). Things have changed again and now I have them the majority of weekends.
Any mutually satisfactory arrangement the parents can come to will usually be accepted by the court. It's tough to split physical custody 50/50 with school age kids unless both parents live in the same school district.
Stop WaitingFeel EverythingLove AchinglyGive ImpeccablyLet Go