I concur, he needs a new tool to satisfy his wife.This comment right here lets me know that you probably would be more successful with a re-tool your approach. Perhaps instead of complaining about the frequency of sex, try expressing your desire to satisfy her more often. Random drive-by affection helps keep the connection in between.
Also, there is such a thing as being touched-out when you are Mom. I only had one kiddo and while nursing, I felt overwhelmed with all of the attention she needed FROM me. I have to imagine it's doubly difficult with two. Had husband approached me about needing attention FROM me, I would have shut down. We both could do better with just random affection from time to time.
We're mid-40s, but some weeks it's almost every day, some weeks it's once. I also have some other medical stuff going on that takes me out of commission for 9 or 10 days out of every 24.