Missed double first base

[MDblue]

While behind the dish yesterday, I had an interesting play happen. With 2 outs and no runners on base, the batter slapped the ball between first and second base. First baseman fields the ball and flips to the second baseman who has her right foot in contact with the orange bag and the other foot not touching a base. The fielder had her foot set on the orange and therefore the throw did not cause her to use the orange bag.

The base umpire made a slight hesitation and then a very weak safe call without any verbal. Now, here's my dilemma. Most of the defensive players have left the field or are almost to the dugout before the base umpire made the safe call. As soon as he realizes she's safe, the first base coach hollers "GO, GO, GO."

I immediately killed the play, basically because I did not want all hell to break loose. I explained to the defensive coach that the fielder did not touch first base properly and therefore the runner was safe.

The offensive coach did not complain at all.

Now, what would you have done?