No, it is not women-specific at all. Protein is protein; how much you need is based on your body weight. Most of that women-specific supplement bunk is just...bunk. Women need more calcium, folate and iron in their diets than men, but that is about it.
A standard serving according to the package is "1 scoop." You can look at the nutirional profile of one scoop and adjust the quantity you use accordingly. If you need more protein in your post-workout recovery meals or in general, use more. If your wife feels like the protein content is too high, start with half a scoop and experiment.
I usually use one whole scoop for recovery or breakfast. If I am just having the mix with water as part of a mid-day snack, I'll use half a scoop in an iced coffee and drink it with a granola bar or one of my Fruity Fiber Muffins (secret recipe - begging might help you).
BONUS: The vanilla powder is fantastic in pancakes. If I am planning a long run or ride I like to fuel up well, and that means pancakes for me. I remove about 1/4 to 1/3 cup of pancake mix and replace it with equal amounts of the vanilla whey for protein-powered pancakes. That way I get protein and do not have to eat heavy eggs with my fluffy blueberry pancakes.
FYI, the best way for a man or woman to get calcium in their diet is not really dairy foods - leafy green veggies and brocolli are best. If you take a calcium supplement, make sure it contains vitamin D (necessary for the body to absorb calcium) and magnesium.