Hello 3shorts,
The first thing I would think of is an email account being "hacked"...
Maybe someone got a contacts list or address from you or your wife's PC/email-id somehow, and is causing this.
I'm just guessing here, but if this happened to me, that would be a concern.
For that, I would start running scans for Virus(s) and Malware.
Also, a bit more detail would help.
Are you both using AOL Web mail (browser)?
Or, are you using client programs such as MS Office Outlook, Windows Live Mail, Mozilla Thunderbird, etc.?
I would also check and make sure automatic forwarding did not somehow get enabled.