Thanks all for the response.
Tim W, I was talking about the ex-wife's. I do understand that the courts don't facilitate fishing expeditions and I wouldn't ask them to.
Sammy01 I was not implying that a person who has a mental health issue cannot also be a great parent or that their capacity as a parent is diminished because they have a mental health issue. On the other hand, it can also be argued that in some cases, a person's ability to function at their best, whether that be at parenting or any other activity can be impeded by the fact that they are suffering from a particular mental health issue.
Either way, thanks again for the insight guys, and Tim, I will utilise archive search in the future.