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Traditionally speaking, you don't want to fill the shadows with a fill light. In portrait photography, shadows have a purpose. For one, to give the face definition. Here's what's happening, look at your wife's right shoulder. She's closed off to the main light. Look at the catchlights in her eyes. The main light is barely doing anything to light her because she's closed off to it, and possibly the hat might be blocking it too, but I think it's more her body direction. Look at how her cheeks are well-lit, but it's not getting into her eyes.
Now look at the catchlights in your eyes. You can see that your main light is working, and you're well lit, although without shadows/definition. Maybe your left side (our right) is 1/4 stop off due to the spillage of light from your background lighting (see the light on the right side of your head, that's spillage).
In this pose, I put the main light to camera right so your wife's body is open to it. The angle of the main light looks good. The bottom of the umbrella should be in line with your chin. That angle, that position, will light you both. You do not need to be in a chair and at the same height as your wife. Up. Think "up".