You know you're a mom when your toddler excitedly runs up to you to hand you something, and that something turns out to be a booger, and you say, "Thank you, sweetheart" and absentmindedly stick it in your pocket (along with the sock you found wedged into the car seat, the banana chip that you pried off the floor, and something that may once have been a blueberry).
You know you're a mom when all manner of nasty bodily fluids no longer gross you out.
You know you're a mom when you spend more time thinking about what you're going to put in your daughter's Easter basket than about the project you're supposed to have finished by Friday.
You know you're a mom when you can sing 642 verses of "The Wheels On The Bus" from memory.
You know you're a mom when the sight of your little one running toward you with her arms outstretched moves you to tears.