At one point a speech therapist did say that some of the coughing was not from choking but from habit. I have been successful at times in getting Mum to stop by either distracting her or telling her (over and over) to stop coughing. I think the staff just wait for her to stop.
Yes, I am bearing that in mind. I have noticed though that there is a difference in her coughing. When she's actually choking, her face turns quite red. When she's just coughing, it doesn't.
BTW, 2jays, you would have to up the eccentric behaviour and ideas by a factor of at least 1000 to sound like "auntie".