I don't know you country and I won't jump into any conclusion but if your are from a developing country I would say you should have a better thought about this. I believe critical thinking of every situation can make things right.

Let's say your mum is a Tailor well to break it down to other who doesn't know how things work in developing country, your mum is not a big time fashion designer, she sows for client let's say mainly her age and if she is above 50 years then that's range and maybe some few younger females are her customers.

Adding to the fact you wrote about your country government stands on Bitcoin, I don't think your mum would have more of Bitcoin holders so stressing her to accept Bitcoin isn't promoting Bitcoin adoption but actually making your mum confused. You should first teach your mum about bitcoin, about the benefits and disadvantages and everything, then let her make her choice then I think she can talk to her customers and friends about it. Only when they full understand and accepts Bitcoin then can she put it as a medium of exchange in her business. What's the essence of making Bitcoin a means of exchange when you may not have anyone using it.