She has a heart of gold.
It is not uncommon for people to have more than one spouse or common-law partner in the course of their lives. Dealing with the estate of a spouse or the division of assets after a breakdown of marriage illustrates how building a common life as a married couple creates legal entitlements and obligations.
If you come from a blended family or have started one of your own, then you know how great this arrangement can be.
Before you dismiss your co-parenting communication style as hopeless, remember why you keep trying to make it work: your kids. If you want to send a message of undivided love then consider doing the unthinkable; beach vacation together.