My wife's iPhone 4 and my iPhone 4S are both using iOS 6. We also sync to an iMac and a Macbook Pro. My wife updated her phone last night. Then today I received a message on the iMac to provide my e-mail password for iMessage and FaceTime. Since then, any text messages sent to my wife are automatically sent to my iPhone. Even messages I send to her are sent back to me as if I had written them to myself. Messages she gets from other people are sent to me as well. How do we fix this so that messages sent to her go only to her? Also we use a single Apple ID for all our devices--iPhones and Macs, but we have done that for a couple of years, and this problem has not arisen before.