"she was saying that I ought to take them somewhere on Sundays if it's nice. I said I might, or I might watch football. She said something else, and I replied, not in an angry way, that that's your opinion, but I don't really have to listen to it now. Maybe i will again one day, but not now"
Hi Heim - just thought I would jump in here as well. I think there was nothing wrong in your intentions or in the point you were trying to get across - but I think like OT said - it is a matter of tact. Just the phrase "that's your opinion" in itself displays a certain anger/tone even if that wasn't your intent. I know deep in your heart you are still hoping that things work out with your W - so every little interaction that you have with her counts.
You can still set your boundaries and get your point across - with maybe something like: "yeah, that sounds like a good idea also, but I am really just looking forward to a relaxed day on the couch with my girls".