Your wife can read your texts on an iPhone if she has physical access to your device and knows your passcode. She can open the Messages app and view the conversation thread to read the texts. It is important to note that this applies if you have not enabled any additional security measures, such as Face ID or Touch ID, to protect your messages. If you suspect that your wife is reading your texts without your permission, you may want to consider changing your passcode or enabling additional security measures to protect your privacy. However, it is essential to have an open and honest conversation with your wife about boundaries and trust in your relationship.