Piecing is hard isn't it! I just wanted to say that I have the same feelings you do about the house feeling whole again!
When H was doing the OW/MLC thing, I was the single mom and I felt lonely all the time. I went out with friends and I have my girls but something was missing...
Now that H is home (its been a year now...) I still get nervous that I put myself out there again. Like your H and you, there will be no more chances in this house. If H does anything like this again I will be gone.
I am not afraid to be alone, been there, done that and survived! I chose to have my marriage and H, I no longer take that for granted. Our M is better than ever, we communicate more and make sure we put each other first...that is hard especially when we both work full time and run kids around!!
I hope you see the notice you are looking for, and the conversation with OW takes place. That will solidify the fact that your H is home where he (and you) want to be!