hair disaster ?

ok, so yesterday i got my hair done (anticipated on getting caramel highlights) by my aunt (she's a hairstylist) & things started to go well until i noticed that my hair was slowly turning out a lot lighter than i wanted it to be. i just let her do her thing cos i have zero knowledge when it comes to dying hair & i figured that the lighter dye would come out dark ( I know, dumb thought). anyways, now my hair is super lighter than i wanted it to be. I'm naturally a brunnette & i believe i look so much better w darker hair. i really want to dye my hair back to brown but i don't know how to tell my aunt that w out hurting her feelings, ya know? she put so much time & effort into making my hair look good but i absolutely hate it. i'm really contemplating on just telling her or go to a different salon & have someone just dye it all back to brown. ahhh what do i do?? 
•the first pic is how my hair turned out
•the second pic is how i wanted my hair to turn out