You know yourself and your abilities (at this time) better than anyone. You also have the good sense not to volunteer at this time. Good, adult decision making!
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OTOH, when my wife decided to get her Texas CHL, (at the same time I did -- after moving back to God's Country from MA) I let her shoot my smooth-shooting HK P7 M8 9mm -- while I shot a tiny, subcompact, hard-kicking "backup" .380.
I trained her, but she had only about 100 rounds of practice -- total -- when she shot her TX CHL qual test.
I shot three rounds short of perfect -- and she shot within ten points of me.
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I'm very well trained and with thousands of rounds of experience. But, my daughter carries a featherweight, double-action .38 short-barreled revolver -- and I have a hard time even "hitting the paper" with it. (The long, hard trigger pull and light weight "throws me off"...)
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Perhaps you're shooting a piece/caliber that is uncomfortable for you. Do you mind sharing what weapon you shot/shoot? (Use FReepmail for privacy, if you prefer...)
Actually my aim and hitting the target is very good. I’ve used an M4, a Glock, and an scar.
But I don’t think the shooter is going to let me stand up and get myself set at the window, take aim, have the ex-marine help me position myself and then shoot LOL
By the way, I am glad for you and your wife.