A senior associate at the firm summons three associates who happen to be ladies, gives one an assignment and asks the other two to assist.
One coyly declines.
Pressed by the senior associate, she puts it that she can not work with one of the associates because she is currently sleeping with Alan while she, the one declining, used to.
The lady associate so accused then points to the associate being given the assignment and blats out "And she wants to" (to sleep with Alan).