If you were sold a normal as a pastel, my first reflex would be to second-guess the gender, too. I would get her double-checked before you buy a mate for her, just to be sure, so you don't wind up with two males after growing them for three years.

That all being said, you have yourself a pretty normal. She has almost no spots in her alien heads, or side pattern. :3 I personally think she would make pretty lessers, if you found a male with high-white sides and nice diffusion (blended sides). But overall, I think mojaves would provide the most stunning future combos when bred to something else. If you wanted a pastel, as was mentioned, getting a pastave could make pastels, as well as mojaves, and more normals and pastaves.

I suggest, however, finding a more reliable source for your male so you actually get what you pay for.