Breast Aug or not ?

I am 24 years old and have a pretty flat chest, I am a AA cup and I am looking into getting them enhanced through a breast augmentation. The results I am going for are very natural and classy. The issue is that I’m not sure how my mom will take the idea of me getting a breast aug, I expect she will be pretty against it but it’s something that I’ve wanted for a while to feel more confident in that area. Maybe this isn’t the right place to post this, but what I’m not sure what the best way to approach this would be. I’m afraid if I tell her beforehand, that I won’t end up doing it.