Dead Ball Appeal

Question
A girl hit a home run and did not step on home plate. Timeout was called, and an appeal was going to be called, but the girl was coached to go back and step on home plate, and when she did the Home plate umpire called her safe. Under the rules is that the right call? The way I read them is No since it became a dead ball because timeout was called.

Response
Once the runner leaves the field of play or time has been called, the runner may not return to touch home plate.
There is no prohibition on coaching the runner.