Thanks Shantell85. This did it.
"To change the picture icon in iMessage, you first need to create a new contact in your address book directly on your iPad with all of your information and make sure to select a picture. Once that's done, go to settings. Click on Mail, Contacts and Calender. Scroll where it says, My Info, under contacts and select your name out of the contact list. Your picture will now appear in iMessage. I believe iMessage defaults by your last name and searches it in your address book to locate you which is why it selected your husband. You guys should be all set from here. Thanks!!!"