Currently Being ModeratedFeb 19, 2013 2:34 PM (in response to Appledumpling1961)
The iPad needs an e-mail address to receive an iMessage at, but it is optional for the iPhone. I suspect what is happening is that your daughter is sending the iMessage to the e-mail address that is defined for your iPad rather than to your phone number. There are a couple ways to straighten this out:
1- Have her start a new iMessage conversation, but this time have her select your phone number from her contacts, not your e-mail address. Then have her delete the prior conversation, or at least instruct her not to use that one anymore if you want to receive the message on your iPhone. OR ...
2- Go into Settings/ Messages on both the iPad and iPhone. Tap the "Send & Receive" section and look at the e-mail addresses under "You can be reached by iMessage at:". Whatever address the iPad is set to receive iMessages at, set your iPhone to receive at the same address. However, this means that both your devices will receive the same iMessage if the sender chooses the e-mail address instead of your phone number.
EDIT: Or do what Tim said ;-)