Please forgive both the shortness of this note and the haste with which it was written.
I have enclosed what I believe to be a fair price to ensure Ms Martin serves me exclusively from this moment forward, as well as a bonus for yourself because you so helpfully matched us together those years ago. I cannot do much for her, but I find that I am not quite willing to share her right now.
If you feel I am not accurately assessing Ms Martin's expenses and her loss of wages, name your price.