She is jerking you around with the kids. Don't let her do that. How horrible is this woman? She can't stand for you to have Sunday with the boys without her taking them away b/c she didn't have enough "fun time" with them? Well, whose fault was that? She sounds like a jealous child who would not like the agreement regardless of what it was! I agree.....ARGH!!
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!