How do I add my wife's phone to my Account

[BDV1973]

When we got our first iPhones 3 years ago I was unaware that you could have more than one device on an iTunes account. I set my phone up with an acct and my wife set her phone up with a separate acct. At first this was not an issue because she was not downloading a lot of apps and most of her apps were free. Well now she has started to buy apps and some of the apps she is buying are ones I already own. I tried to change her iTunes login to mine but every time I try to make the change it gives me an error message saying...This email address is already in use by another account. What am I missing to make this change.

 

[kch50428]

on her phone, go to settings, iTunes & AppStore... then hit AppleID at the top, and sign out of the logged in AppleID, and then log in with yours.

 

[BDV1973]

Thanks...I was not logging out of hers first. Thanks again