1. the statement in the Will that after wife's demise the property will go to children in equal share may pose a problem
2. it appears that intention of your father that his property should be enjoyed by his family members
3. the above is one interpretation
4. another interpretation of that statement would be that the father wanted your mother to become owner of the house and in the event she dies the property should go to his children
5. so once the mother becomes owner she can do whatever she wants with the property of which she is the owner
6. even under the intestate succession if your mother passes away the property will go to the children who will be the legal heirs
7. one solution would be to ask the opposing brother to buy the property from your mother by excluding the value of his share in the property which he claims i.e. he can buy the balance 3/4th share
8. the above is to solve the problem amicably
9. if the son does not submit to this request then your mother as owner will have to file an eviction suit against the son
10. your mother can sell the property or donate it to the trust by a gift deed. However the buyer/trust will be accepting the transfer at their own risk considering any challenge the son may make against this transfer by invoking the clause in your father's Will. However his challenge will be limited to only his 1/4th share because as per the Will all children are to take equally after mother's demise