Mr. Nigel,
Your post for the lady who does not stay in the tenanted premises. By law, the landlord can ask her to vavcate the premises and revoke the tenancy in Gujarat. She is lucky that the landlord has not done so. Also, though she may be able to prove that she requires the bungalow, it is very difficult as she has not been staying there for years even though the rent is paid by her daughter.
As per tenancy laws, tenancy is transferred to the persons staying with the tenant in the tenanted premises at the time of death of the tenant. since the old lady is not staying there, the tenancy may not be passed on to anyone unless they have evidence ot show that they stayed with the lady in the tenanted premises.
There is also no share in any tenancy in terms of any money. The person claiming share in tenancy has to come and stay there as his/her share. Only when the tenant transfers the tenancy rights ot a third party with proper permission from the landlord (who will take his share of the amount 33% for giving the permission if he wants to give the permission - the landlord may not give the permission and can ask fro vacating the premises)
So, the tenancy does not pass on to the children but to those who stay with her and she has to stay in the tenanted premises.
What she can do is to stay in the tenanted premises along with her daughter for some time and then request the landlord to transfer the tenancy in her daughter's name.
And the son cannot phone and ask for his share. Even fi he asks and also goes to court, he is unlikely to win.
S Jadhav