I know quite a few people with MS (I was a volunteer for 10 years at an MS therapy centre) and I can vouch for it being one hell of an illness for some. It can invade every part of your life, depending on which nerves are affected, those serving walking and balance, those involved in fine movement and touch, those triggering bladder and bowel action, the optic nerve, and the cognitive processes, and all combinations and permutations of them.
I am not surprised, Jings that she "goes on about it" It is with her at every moment of the day, and whatever she is doing. In fact, what she is complaining about is the attitudes of the general population, which make her feel that her inability to do all the things that are labelled "grooming" make her somehow a second class citizen.
Frustrating is a very mild word for her position.