Final Rites for A Spinster

My dear Vasu Vadyar Swamin,
One of my friend's elder sister reached Acharyan Tiruvadi.She was a
spinster. She did not undergo Samasrayam and he performed the last
rights. Is it necessary for him to perform the Masyams and also the
annual Srardham.
Kindly enlighten me on these aspects.--kannan