I wasn't trying to be brutal...I just don't care to sugar-coat my message.
You asked if it was "abnormal" for life to get in the way. The answer, of course, depends on your situation. If you're already having sex five times a week, and he wants more, then, no, it's not abnormal for you to want to clean the kitchen instead of spend time in bed with him. But, the question becomes harder to answer the longer you go between ML sessions. And if that duration is affecting his ability to commit to the M over the long term, then you need to start asking yourself if there is something wrong with your own unwillingness to make your sexlife a priority in the marriage.