Longhaul, if you want to keep her happy I think she is asking for something extra. I made moscato from a juice bucket and started out by adding strawberries and home grown tart cherries. It wasn't enough flavor for me so I added natural strawberry and natural coconut flavorings I got from Labelpeelers. I call it Pina Colada Moscata. It's a big hit with sweeter wine drinkers.
What ever you choose to try, do bench trials first. I have a whole box of flavors to play with. Blueberry doesn't sound appealing to me with Moscato, but I didn't think chocolate would be good with some of my wines and chocolate turned out to be a wonderful addition to some reds and fruit wines. Raspberry does sounds appealing tho. Have wife try the tests too, and if you disagree with her maybe bottle 1/2 one way and half the other.
It's your wine, but I sense your wife wants to punch it up a notch.
Pam in cinti