My MIL is basically my co-parent now. Ha! So yes, we are in daily contact. H doesn't speak to her at all. Nor to any of his fam.
Yes, it is hard. Especially since there are photos of H and I all over her house which I am at every day to pick up S after school. And we did NOT get along for a long time. Until we had to. Until I swallowed my pride. I know I was to blame for our (MIL/my) tense R so I took that responsibility. What really helps me though is thinking about life from her perspective. How upset would any of us be if our children did this to another human being that we cared so much about? It is pretty traumatic for them as well.
But really Rope, you have to put yourself at number 1. If you are not ready, you are not ready. And maybe you will never be. And that is OK too. We all have to do what is right for us. Hugs friend.