I really think he needs to find someone who is a writer or does something that is portable and can go away with him on location. He appears to always be the one to make the most effort in this relationship. I could totally see him having a family vacation on a yacht. Just replace Dada with a toddler
If she isn't serious about having kids, it's best that he moves on and finds someone who is. Now that he's in his 40's he needs to get a move on it 

