I found,---and I have seen so often reported, here, on the forum that in many situations that one is functioning like a single parent, anyway, without realizing it. It became so much easier for me when I became single--without all the inner stress that the husband was causing me.
When one becomes a single parent, we change our expectations. No more unfulfilled expectations. Reality is actually easier to deal with than high expectations that disappoint us..over and over...and over.......UGH!!!
I also think it would be fair to let him know why you have made these arrangements for the children---you don't have to, of course--but, it would only be fair if you did. I know the Universe gives me pleanty of feedback when i have F*****-up! LOL
dandylion