What would you do?

[Nevadaref]

Do what Mark said and here is how to do it in real life:

WITHHOLD WHISTLE
10.4.1 SITUATION E: A1 is driving toward the basket for an apparent goal when the official, while trailing the play advancing in the direction in which the ball is being advanced, is cursed by the head coach of Team B. How should the official handle this situation? RULING: The official shall withhold blowing the whistle until A1 has either made or missed the shot. The official shall then sound the whistle and assess the Team B head coach with a technical foul. If the official judges the act to be flagrant, the coach shall be ejected and shall leave the vicinity of the playing area and have no further contact (direct or indirect) with the team. If A's coach was the offender, the whistle shall be sounded immediately when the unsporting act occurs.

PS You are very fortunate to be in an area that does this:
"JV Girls game tonight. I am R in 3 whistle crew."