Yes but Neil is (last time I heard) unmarried and still hasnt grown up past the Men Behaving Badly stage. His career is nowhere near as successful as MC. MC seems to be a bit of a hot head and much more open than PB eg: the reaction to his ex wife's articles and that awful reporter. I think PB's advice has been spot on on those occasions. For all we know its just a discussion and a mutual decision but MC just says things like PB wont let me as an excuse.
It's great to see MC mature gracefully and stay fit and healthy with his chosen partner.
I think she gives him the structure and stability he needs and most likely very good professional advice. They have shared interests and his career has advanced because of the stability. Structure is good for people and she most likely has his best interests at heart.