Q: can we have two different accounts on the same pc

Hi jsmsimp,

Welcome to the Support Communities!

If you share the same music library on your PC, and want to share all of your iTunes Store purchases, you can use the same Apple ID.  Your wife can create a different Apple ID for her contacts, calendar, email, Photo stream and other iCloud services.  In the Settings app on her iPhone, she just needs to indicate what Apple ID she wants to use for the iTunes Store, and what Apple ID she wants to use for iCloud.

The article below will explain this in more detail:

http://support.apple.com/kb/HT4895

Here is some basic information to get her started with the iPhone:

iPhone Basics

http://support.apple.com/basics/iphone

iPhone 5S - Tips and Tricks

http://www.apple.com/iphone-5s/tips/

iPhone User Guide for iOS 7

http://help.apple.com/iphone/7/

Cheers,

- Judy