For all you know she is capable of getting around short distances without it and lunging.. ....... that is one hell of an assumption. you are obviously not aware what 5 years of dementia can do the senses of balance and movement. why do you think she used a walking frame?
I could give you a rundown on the pathology of aging if you have 15 minutes, or you could just admit this comment is as ludicrous as a copper even thinking about using a taser on a 95 yr old.