Shortly after moving into our house 8 years ago, my wife did a load of laundry and forgot to remove a pair of shorts from the sink into which the washing machine hose drained. I came home to find water coming out of the mudroom door into the garage (laundry room on 1st floor off the mudroom). Like you, I helped clean it up and pointed out, calmly, to my wife what happened and why. She was appreciative of the manner in which I handled it, which I fully realized later that night.
Two months ago the same thing happened. While I could have gotten upset, pointed out to her how she didn't "learn from her mistake 8 years ago", etc., again I helped clean it up and joked about her need for some ginko biloba. Again the reward for taking the high road was worth it.
You are doing the right thing Chief. Even if there is a nice reward awaiting you later, this is going to be a powerful card in your deck for quite some time.