What If???

[Just Curious]

This scenario happened in my game yesterday..
BR hits a dribbler to F5.. F5 throws to F3 for a close call at 1B... F3 is straddling the white bag with one of her feet on the orange bag too..
F3 has the ball before the BR gets there, but the BR collides with F3. BU calls the out, but base coach wants an obstruction call for being on both bases..
The out call held as the BU cited incidental contact..
I personally saw it as obstruction since F3 cover both the white & orange bases.. I believe that I, as the PU, had a better view of what F3 was doing..
My question is: Could the base coach have requested my input (PU) on the call? I suspect that the BU could have said no, that it was his (BU) call. But if the BU wanted to honor the base coach's request, how would this request be properly conducted?