There’s nothing at AD that smells similar to Prada. No chance there, lol. So, we’ll work with what we have. It’s sweet and thoughtful of you to want to do something special for her, Alpha…and it’s hella fun having a partner in crime. 
If you’re feeling ambitious 
, you could put together a very nice package for her yourself. Using Prada and a pretty atomizer from Sephora. You could mix up your own special pheromone perfume by using the higher concentration of Instant Shine/4X or Instant Openness/4X and adding it to a few milliliters of actual Prada. I’m sure one of the guys/girls can help you with the ratios. Math makes my head hurt, lol. I’m a more of a layer kinda gal anyways. Though I do add copulins to perfume all the time. 
OK, from what you’ve said about her dislike of Chocolatini, I’m gonna say careful with the Cookie and Coconut. They both have great diffusion and the scent lasts a long time, but they’re sweet even when mixed with grapefruit. Though it’s true most men love sweet scents on women, some women are not so enamored of them on themselves. Try feeling her out on what kind of sweet scents she likes or doesn’t like before you jump into the Cookie jar.
If you want something she can use alone/daily or with other perfumes, including Prada (should she want to layer with it some evenings), I would go with neroli or grapefriut…or…how about a combo of neroli and grapefruit? 
Bella