I dont see an issue with working the game. If you have worked BB for as long as it seems, and in the same area you could easily make this argument on most of your games. How many veteran officials were former AD's, coaches, or teachers. How many were baseball coaches, soccer coaches, of children that are playing or related to other school personnel? You could play the six degress of Keving Bacon all day. If your truely uncomfortable find someone else working the same night and switch with them. Otherwise go out an be the professional you appear to be on here. If her cousins team loses you may have to sleep on the couch for a few days