Property division

my husband sister marriage was on 2012.at that time her father gives 60 pavan gold to her.. After 1 year (2013)she died( during delivery) due to cancer and she have a child, her husband take care that child(girl).and her husband remarried on 2014 and have another daughter on that relation.. My husband family have 30 cent property.. His Father mother are alive.. Now my husband sister's husband claims he need 10 cent land otherwise he need 20 lakhs...and my husband father does not collect back that 60 pavan gold given to her at marriage time.. Husband father was an auto driver.. Sir i want to know is that child have same equal rights to claim property.. Is that gold worth is not calculated during property sharing.. We are ready to give share.. But we dont have this much amount in our hand. And that girl have 8 years old now.. But he demanding he need property before next October 15..we are hindu family.. Husband fathers father brought that land. I want to know that now that girl is minor.. When that child is become major then only give her mother share..