It wouldn't annoy her if you talked about it with her first. That it was actually an intervention of sorts. She might actually think it's a very good idea to get you acclimatised to asking for things. Because how are you ever going to learn to ask for big things or for something important to you if you can't even ask for a pebble? It would be good for you to learn experientially about how it feels to get your needs met.

It is terrifying but therapy is terrifying. It would probably be a worthwhile exercise.