When it comes to co-parenting, best interest of the child is always a hot topic. Opinions may vary, but lets hear what a Family Law Attorney has to say about the topic. Heather O'Connor is the Founding attorney for O'Connor Family Law. Her law firm is located in Massachusetts, she's very knowledgeable, and doesn't mind sharing her thoughts on the topic. 
Where you can find her: https://www.familylawma.com/