It is intimidation all day long and twice at night. You do not have to verbally communicate a threat for it to be a threat. In the scenario your motive was clear and you proved that you have the means to carry it out. That said if I was on this call, I wouldn't make the decision to arrest by myself. I would call my prosecutor at the house and run it by him before acting, or I would long form it.
So it is intimidation to show a firearm to a fellow who has just stated an explicit intention to commit a criminal act which will have your minor child as a victim??? Did you read my post above?
If you are so sure it is intimidation, why would you be calling the prosecutor?
Best,
Joe