JGran Is it your son's idea to ask for your property, or is his father behind these claims?
Your grandchildren are at an age where they can make their own decisions as to whether they keep in touch or not. Contact with grandchildren does often thin out as they become independent, start work, continue studying etc.
I think what you need to do more than anything, is protect yourself. Talk to someone, a friend, other family member, someone you trust. Speak to Age UK. Here is a link to their Factsheet on Elder Abuse. www.ageuk.org.uk/globalassets/age-uk/documents/factsheets/fs78_safeguarding_older_people_from_abuse_fcs.pdf
I would read it.
I know it is very hard to accept that your son, whom you love and brought up alone, is behaving like this. So many older people in your situation, understandably react like this, but you must take a step back and look at your problem as if it was happening in someone else's family and think what you would advise them to do. Then do it yourself.
By special request, let’s discuss our favourite Classic Music and why?
Some entitlement issues.