Yesterday I took a trip out of town with my wife regarding family matters. We knew we would be tired when we returned home later last night, a Saturday night, so we had planned on going to a Saturday evening Sunday vigil Mass once we arrived into the major city we were driving to.
Once we arrived in the city, it took longer than we anticipated and we missed Mass on Saturday evening. So we knew although we would get in very late we had to get up this morning for Mass.
Well, I was awake at 7:00 am and said to the wife, “let’s get up and get ready”. She pleaded on sleeping a little longer even though we were awake, as she didn’t want to go to the first, 8:00 am Mass, and suggested that we could go to a later Mass either at 9:30 or 11:00 am. So we went back to sleep, and yes we overslept. We didn’t make Mass at all and failed our Sunday obligation.
My question is (as we haven’t been Catholic very long) although we didn’t deliberately miss Mass, did we commit a grave sin by failing our Sunday obligation, and if so does this exclude communion until confession? Or is it a grave sin only when you intentionally plan on missing it?