Will his ex-spouse is legal heir for any claim.
بسم الله الرحمن الرحيم
If the iddah (of talaq) of your bhabhi was already over at the time of your brother’s death, or your brother gave his wife talaq bayin in the state of health or your brother gave talaq bayin to his wife with her consent then your bhabhi shall have no rights in the property of your late brother.
Allah knows Best!
Darul Uloom Deoband