If you have any reasonable shot for an out at 1B in that situation, the ball has reached the Right-Fielder in a big hurry. It's really no different than if the ball had been hit to SS, and she had thrown to 1B. A runner coming from 2B isn't automatically scoring unless your First-Baseman can't execute a throw Home.
When the throw from short RF reaches 1B, the runner coming from 2B is rounding 3B.
Even if the throw to 1B is too late to get the batter-runner, there's a reasonable chance that runner rounding 3B is toast.
When the throw from short RF reaches 1B, the runner coming from 2B is rounding 3B.
Even if the throw to 1B is too late to get the batter-runner, there's a reasonable chance that runner rounding 3B is toast.