I also think you or your mom, or maybe both of you need to get an appointment with the trainer and have a SERIOUS talk about what your, and your mom's expectations are and where you want to go with your riding. Find out from the trainer her reasoning for having you where she does (maybe she wants to build your confidence a little more first or something) and then come up with a plan together that satisfies you. Or, if the trainer doesn't want to go the direction you want to go in, then maybe it's time to move on.
In my experience there are some WONDERFUL trainers out there. But, some of those trainers only get you so far, and then you need to move on. Sort of like the rungs of a ladder. While one is fine and dandy and does the job for that step, you can't move on until you step up a little more to another one.