I think any decision to have children is a huge one. He would be tied to those children legally for at minimum the first 18yrs and ideally life. Time, attention and resources being finite it has to be factor into a women thinking....to provide the best, most stable environment as possible. By the simple fact that they are married and he could be making a decision that most certainly will effect her for as long as all those involved are a live....I think it does relate to her. Not unrelated.....actually they would become "related"
I'm sure the women here will be able to better articulate their feelings on this type of life decision.