Wanda filled out the order form incorrectly, and instead of getting the Bread Of The Month Club, she ended up in the Breast Of The Month Club.
At first, she was shocked by the boob in a brown cardboard box that she got in the mail, but she tried it on and found it supple and firm, much more so than her two.
She filled out another order form, and the next month, she got two boxes in the mail.
A pair and a spare.
She used the pre-paid postage to send back her own tits, and went bra shopping.