Seems he was just a family friend willing to help out. But it was a serious mistake to have him act as the intermediary rather than a lawyer. The agreement drawn up does not preclude the woman from divulging the terms of the agreement, nor does it require her not to make the whole thing public via the media. This is very sloppy indeed and something that for a bit more money (the cost of a lawyer) would have been taken care of.
So sloppy is the agreement, it is perfectly obvious that the Panthers club were not involved. If the club were, they'd have seen to it that this was done properly. Cartwright's management should have questions to answer too as to why this was allowed to happen.