My Mom is 95 years, we would like assistance in have a "Will" prepared on her behalf.Would would I need to that end?

You should actually NOT be there.  I never allow the adult children to be present when a parent is making a new Will.  That's for your protection as well as mom's.  It prevents a sibling claiming that you told mom what to say, or that mom only chose you as executor because you were sitting there.