Son's right in mother's ancestoral property

Dear Querist, 

1. If the property is ancestral, though held in your Husband's Name, his sister(s) have a equal right as coparcenors, they can seek setting aside of sale or gift in case your husband succeeds in selling without their concurrence. They can also seek a partition. 

2. Market Value. 

3. The Answer is NO, Women are not sources of coparcenory, in simpler terms, your husband's mother is a coparcenor and entitled to equal share with her brothers in ancestral property. But her children do not acquire a birth right in that property for the simple reason they are not part of their mother's coparcenory, their right would accrue on mother's demise only. 

4.In Hindu Law - a child is born with property (Not just a silver spoon as an adage says!) your daughter is entitled in equal measure with your husband, and can get her share culled out whenever she wants through a Next Friend (which may be you)

Hope I've been of some help.