Vapcaps are great and they really are handy for microdosing. They are also useful for taking one or two hits now and maybe another few later.
That said, not every spouse is going to be into the technique and ritual of vapcap use. Some folks aren't trying to use a torch for every hit and not everyone enjoys the mouth pull most vapcap users employ (i.e. dragging like a cigarette only several times as one hit).
With the epic black Friday sales already kicked in, I'd consider an affordable session vape like the Arizer Solo, which is currently on sale at Namaste Vapes for $81.
Let's say you went that route.... Instead of your wife handling a butane torch for each hit, or you heating it and carefully handing to her, your session would go like this:
Turn on the Solo
Put a bit of weed in the glass stem and insert it once it's heated up
Pass it back and forth so you can each hit it one to three times
Turn it off and remove the glass stem
In by experience that's an easier couple session to manage. If money isn't tight then spring for the Solo II, which has better draw resistance and double the battery life and is still only $140.
Both the Arizer options have temp controls too so you can get more high with high temps or have more flavorful, comfortable vapor at lower temps.
I own several vapcaps and like them, but you can just do a third of a stem in a vape like the Solo and not fuck with torches or combustion or reheating for each hit as you share.
Better still, get one vapcap M on sale and then get a Solo or Solo II and you'll have the best of both worlds. It's not at all awkward to take turns with one vapcap since you're only sharing .1g or less. I don't think buying two of the same vape makes much sense for a couple new to vaping.
And if anyone joins you or you want to get more high for a special occasion the glass stems for the Arizer vapes can be filled to different amounts.
https://www.namastevaporizers.com/products/arizer-solo-vaporizer
https://www.namastevaporizers.com/products/solo-ii-by-arizer