Sorry, sending a forgot password email to a CC'ed or BCC'ed address isn't possible. I recommend submitting this as a Feature Request under the specific add-on category. It'll also give other users the option to vote up the feature request, and help us prioritize features to add in upcoming versions of this add-on. :)
There are no hooks in User to add this functionality either. A hypothesis here, but perhaps there is a 3rd-party add-on that hooks up to email sending timed well enough enough to add a CC or BCC to the sent email. However, I highly doubt this exists.