*Sigh* Multiple Account Question

I have two accounts. My wife keeps seeing me play this game and she wants to play, but I don't want to give either of my accounts. They are mine! :)

I'm assuming IF she played, she would want 2 accounts also. This, I assume is a big no no. However, I log in only through my laptop and aircard. She would log on through our home internet. Technically it's 2 different IP addresses, but I have put some time and (for me) a lot of money into this game. She would join my alliance and no doubt we would help each other, me more so since I"m so far ahead.

I don't want to lose my accounts because there is no way of telling if it really is another person logging from a different IP. Or if it's me just making all this up. So what are my choices that would allow her to play without any risk of me losing my accounts?

1. Give her my 2nd city. - No

2. Take the chance. - No

3. Tell her sorry but you can't play. - Rather not