I think the father knew that Cat was going to be like a dog with a bone until she got at the truth so inviting the odious Frank to the funeral was, he hoped, a way of getting her to go back to Dublin ASAP.
I assume the death certificate stated that death was caused by an injury due to falling but I don't remember that bit. Everyone was told that she fell at the side of the pond.
I felt so sorry for Barry. If Cat hadn't dragged him into her battle he wouldn't have committed suicide but then he would have done anything for her.
Why Are Blokes Obsessed With Noisy Gadgets??