I'm putting this under Life in General instead of Family, since even though this was my husband, it's more of a general question.
The question is, how egregious of an etiquette faux pas is it to step in and finish someone's cooking without their permission?
Here's the background: DH usually does the cooking, but he had a late meeting so I did the cooking. I made risotto, the real kind that is pretty labor intensive. DH came home when I was almost done and was clearly engrossed in what I was doing. He asked me if I had put mushrooms in the risotto. I told him I hadn't.
After I was done and was working on the rest of dinner, DH chopped up some mushrooms and added them to the risotto. I was LIVID.