Cheating accountant and wife

A 54-year-old accountant leaves a letter for his wife one evening which read:
"Dear Wife, I am 54 years old, and by the time you get this letter I
will be at the Grand Hotel with my beautiful and sexy eighteen year
old secretary."

When he arrived at the hotel, there was a letter waiting for him that
read as follows:
"Dear Husband, I too am 54 years old, and by the time you receive this
letter I will be at the Savoy Hotel with my eighteen year old toy boy.
Because you are an accountant, you will surely appreciate that 18 goes
into 54 many more times than 54 goes into 18."