my wife is getting all my text messages on her phone???

Is your wife signed into your Apple account? Because she may be linked to your iMessage account. Go into Settings->Messages->Send & Receive and make sure that only your phone number is selected.

Also maybe disable iMessage on her phone or alternatively create a new Apple account just for her. In the long run this is the best option.

Hope this helps!

-Colm

You should not be sharing an Apple ID....

Create your own... http://appleid.apple.com

Use the new ID... Settings > Messages > Send and Receive