ETA coaching when the adult child requests it is another story. If you have special expertise the child doesn't have because of the child's age or because the child is in a different line of work or has a different profile of interests and skills, and asks to be couched, i.e., takes the initiative and actively seeks out couching by one of the parents, why not provide said coaching? And maybe I made an assumption that your daughter did not actively seek your guidance and coaching. If she did and you provided it, I take back what I wrote in my previous post.