Glad to hear she interested.
Like BB said, getting her in a real training class would be a good idea.
I also agree with having her learn from someone else. It's not personal, but she may subconsciously feel that there is competition between you even when there's not. That is a normal feeling when being taught by somebody who is family or close friends. Especially between spouses. With an outside instructor, she can relax and focus on learning. This is something she needs to feel comfortable with and that she's doing it for herself, and not under someone's shadow.
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I agree, but be careful because she may start out shooting you. Ask me how I know.