Mommy's Helper

A young girl returns from the mailbox on a crisp (it was bitter and cold) Fall day. She brings her mother the mail.

Mama: Anything good in the mail?

Girl: A few bills and a lying catalog.

Mama: Which catalog is lying?

Girl: This bra catalog.

Mama: What is it lying about?

Girl: It says that Push-Ups instantly add two cup sizes.

ADDENDUM: You do understand that when she thinks of push-ups she thinks of gym class, right?