Dear friend, welcome to HCM.
That she has lived well all these years and with a strong pumping heart (not failing), she has no immediate worries.
The regurgitations (backward leaks) across mitral and tricuspid valves are probably old causing the same murmur.
So nothing active is to be done.
Only she should neglect any fevers, infections and keep regular medical checks, as such leaky valves can sometimes get clots which get infected (infective endocarditis
needs treatment on its own merits.
Hope this helps.
would like to help if you have any more queries.