I am a fashion designer and I own a tailoring center too, it would have been better if the shop belongs to you, it makes less sense if the shop belongs to your mother because how will she accept something she knows nothing about? I am guessing she is an older woman, I bet that she will say no to this if you tell her about your plan and I don't blame her.

Older people finds Bitcoin too complicated, they can't even make transaction from one bank account into another without their sons or daughter standing next to them to put them through and we all know that Bitcoin is different.  

What do you expect her to do after receiving Bitcoin in a wallet? Can she send to exchange and trade? Do not Stress your mom, it's not as if she will make double gains accepting Bitcoin in her business, what is her gaining doing it?

If the shop is yours then you can, I am accepting Bitcoin because I want part of my money in Bitcoin anyway, I am a long term holder too and I also want to create awareness.

Think about it very well, it's better if its your business.