Trying To Remember

Two very elderly ladies were enjoying the  sunshine on a park bench in Miami.

 They had been meeting at that park every  sunny day, for over 12 years, chatting and enjoying each others' friendship.

One day, the younger of the two ladies, turns to the other and says, "Please don't be angry with me dear, but I am embarrassed.

 After all these years, what is your name? I am trying to remember, but I just can't."

The older friend stares at her, looking very distressed, says  nothing for 2 full minutes, and finally with tearful eyes, says,

 "How soon do  you have to know?"