When Brooke finally gets the conference call completed and everyone is in agreement, Streeter hops on. It would be reasonable and normal for all participants to inform him that he joined in too late, the call is over. Brooke could also say goodbye, that she gave her input and had to go, she was no longer available. With Brooke's elevated level of frustration, there is no way she would stand for Streeter undoing all the work she just completed.