1. Law is not for teaching lessons or for settling scores. it is for seeking justice.
2. The property was finally owned by your younger brother and his wife.
3. After the demise of your younger brother, intestate, his share of the property will be equally inherited by his mother, wife and children.
4. In the instant case his mother also demised before the death of your brother for which the share of the property of your brother will be equally inherited by his wife and children.
5. In the above matter, you have no claim on the share of the said property of your brother.
6. Your younger brother's wife and her children are within their rights to deal with their said property the way they liked.