Isn't it about time for Mr. Boomerang to be home?
I think after a day like this I'd be waiting at the door, keys in hand with a list of small errands to run.
1. Pick up some milk. (I think we all know now that Folgers is not a good Mo drink substitute.)
2. Drop off the dry cleaning.
3. Stop and use that book coupon while you are out, or sit and read with a cup of tea in peace and quiet for no less than thirty minutes.
Have at least three things on your list so when you say you have just a few errands to run, you will be telling the truth. When asked what they are, just say "I need to pick up some milk, drop off the dry cleaning, you know, just a few things. I should be back soon. Oh, and dinners in the oven."
Hang in there. Every minute is getting closer to bedtime and closer to a new day so the two of you can start all over again. (That's supposed to be a positive!)