My Father & his sister made an agreement on 20 Rs non judicial stamp paper in the year 2018.i.e My Fathers sister was bedridden & under serious medication, so she took a sum of Rs 1, 50, 000 for her medical expenses in cash, by keeping her ancestral property as security & promised my father to release her rights in ancestral property upon further paying 50,000 Rs . However she died unexpectedly during medical treatment without returning the money & releasing her rights in October 2019.
Now one among her legal heir does not want to release his rights to my father. In this case how my father can take legal action against them ? 2 other legal heirs are willing to execute any agreement for accepting the consideration taken by their mother.Kindly give us your legal opinion what can we do further ?