My mother is in her 80s and has been diagnosed with dementia in the last 6 months. I am very low contact with her (haven't seen her for 18 months since my father died and I have only spoken to her on the phone a couple of times in that time) due to controlling and manipulating behaviour since I was a child and throughout my adulthood.
She has been phoning my DS who is 19 pretty constantly. Yesterday she phoned him 21 times, including 6 times during the day when he was at work. 5 of those calls took place within 2 minutes. She then phoned him once yesterday evening when he was out with a friend and then 14 times between 10.30pm and 11pm last night. Some of these were phone calls, some facetime calls and some whatsapp calls. She also leaves a lot of voicemails.
DS works full time 9-5pm so can't usually answer the phone during those hours. He was getting ready for bed and winding down last night and then was inundated by these calls which is very unsettling for him.
Last time DS saw my mother he found it extremely upsetting and stressful. He went to see my mother because he feels he should, but she was very emotional on that occasion and he found it overwhelming and ended up crying himself. She also asked him repeatedly why I wasn't coming to see her which isn't fair on DS. It's a tricky one because there is no one to go with him so he has to go on his own.
How can I support DS with this?