you would have told me that you have a prescription

One day a woman goes to pharmacy shop ad says ,

I need a poision that will kill my husband ,but it should seem as all was natural

Pharmacist say

Ma'am norther me or not any one will do this for you , 

 I would call police and report 

Womwin says wait , 

And takes something out of his purse and gives it to the pharmacist, 

Pharmacist see, his wife is making love with the woman's husband 

He says to the woman 

Wait I give , 

You should have told me that you had a prescription