When to overrule

[Snocatzdad]

Runners on 2nd and 3rd 1 out. 2 man crew high school game. Base ump is sitting behind SS. Ground ball to F6 throw is wide to F3 and F3 pulls her foot to make the catch. Base umpire calls out. From Base umpires view (almost 90 feet away and bad angle) no way to see foot pulled. Plate umpire stares at 1B coach after play looking like a cat who ate a canary dying for someone to ask what he saw.

Now IMO what should have happened is that the OC should have asked the Base umpire to check with his partner to see if his partner saw the foot pulled.

My question is at what threshold should the PU speak up to get the call right without being asked. It's no shame on the BU he missed the call, BU was in a lousy position because of the lead runners, to see the pulled foot.