A man and woman are lying in bed in the early morning before the kids are awake.

They decide to have a quickie before the man gets ready and rushes off to work, and before she has to start her day of getting the kids ready for school and running errands.

When they both finish, the man gently kisses her on the forehead as he's exiting the bed and says "I love you and your big vagina."

The woman accepts the sentiment, no matter how awkward, and chalks it up to him having mispoke. Now, as she's lying there not wanting to crawl from under the covers, he gets ready and rushes out of the house. She starts to wonder, "do I really have a big vagina? I've always assumed it was normal sized."
She then decides to try to not dwell on it and goes to wake up the children.
One by one the kids are awake and dressed, and she prepares their lunches for them, hurrying them off to the bus stop.
She goes back into the house to get ready and run and pay bills and other errands.
Most st of the day she has been trying to ignore the statement her husband had made, but over the course of the day it starts gnawing at her. She decides that she will investigate this matter when she gets home.
The woman makes a stop by a store and pics up one of those long rectangular wall hanging mirrors.
Not realizing the time of the day and noticing it's close to the time the youngest child's bus arrives at home she speeds home and frantically runs upstairs with the mirror.
She strips naked and is standing over the mirror lying on the floor. Closely examining her body. In all of her anxiousness she doesn't hear the front door open and the footsteps on the staircase, and all of the sudden she hears a small voice cry out, "whoa mom! Look out for that big hole in the floor!"