Anything that comes to him is also hers. So, it will only stir up unnecessary ambiguity and confusion, if this topic is discussed in her in-laws house.
All daughters-in-law should know that they have no legal right on things that their mothers in law own.
In general the wife gets some jewelry on some occasions before and after marriage from parents and in-laws. This property is called ‘stree dhan’. Therefore, the daughter-in-law has no right on her mother-in-law’s stree dhan.
In common parlance whatever the daughter-in-law gets out of marriage is taken by mother-in-law for safe custody. If mother-in-law passes away without leaving a will, the daughter in law legally receives it, but not the son.
By and large, only a rare bride would maintain some proof for the stree dhan.
In a recent judgment the Supreme Court ruled that a widow even if remarries is legally entitled to her first husbands property.