I'm 21, and my curl pattern changed recently from 1b to 2b because I stopped using silicones. Everytime I let my hair down my mother asks me - why the heck did you curl your hair..and each time I patiently reply.. Ma , it's wavy, and this is how my hair really is..lol.
Anyway, tell your mom that you like your wavy hair, she should respect your decision and eventually get used to it..

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HAIR TYPE -2a-b, black, mostly medium
CO WASH, RO-HE HH and ENLEVEN and GARNIER RANGE
CLARIFY- I use sulphate shampoos silicone free(diluted), vinegar rinses
DC-pure coconut oil, olive oil, sometimes a SMT
LI-aloe vera gel + castor oil
I'm currently at BSL, aiming for waist length.I'm a very impatient person, wish me luck
I love my flat iron, but I love my waves even more. :-D