Law

If your mother owns the house, than your mother gets 100% of the sale proceeds of the house. If your mother is concerned about how to "gift" some of the proceeds, she is not required to give anything to her daughter-in-law, specifically if she wants nothing to do with her and the rest of the family. If your mother is a co-owner to the house, she needs to contact the other co-owners and work something about with them.

yes sure she is eligible to get the share

  She doesn't want contact with the family then I would not give her anything. Now if your late brother had children . I would say give your brothers share to the kids in a trust fund. That would make it fair.

Subject;"Presumption Of Innocence" in background checks. If an employer states their company intend to take "adverse action" that includes denial of employment or any other decision for employment purposes based wholly or partly on a background check and sends you a copy of the background with all arrests being dropped, not proscecuted or not guility is their legal liability of neglegence or the presumption of innocence.   

Your mother is alive?  Then the property is hers to do with as she wishes.  Also if she makes a will,  her wishes will be granted,  in other words if she wishes to give the proceeds to just one child of hers, she can.   Now if there is no will and she were to pass away,  then the law gets complicated,  depending on the state laws.  So tell her to have a will drawn up.