There are specific ways of protecting the rights of the mother, but they are set by law. The mother cannot just change the will. Some states allow the widow to 'take against the will' and take the share she would be entitled to under the intestacy laws. Sometimes this is done for tax reasons.
children
yes and sometimes your children it has happend to my father
The 13th Ghost is "The Willing Sacrifice". He is the father of the girl and the boy who is willing to sacrifice his own life to save his children.
If all assets were held by the couple as joint property with the right of survivorship then full ownership of the property passed to the father's companion when he died. The children would be entitled only to property owned by their father in his own name alone. Any such property would pass to his children under the state laws of intestacy if he died without a will.
The grantee on the deed is the owner of the property. If your father set up the ownership of the land to be in his elder son's name that is prima facie evidence that he wanted him to be the owner. In fact, since the deed is in his son's name the father is not legally connected to the property. = =
The laws of intestacy in Louisiana are unique. If you die without a will in Louisiana the laws of intestacy will distribute your property to your spouse and children. The division of the property depends on whether the property is separate property or community property. Community property is property that was acquired by a married couple during their marriage. Separate property is property that was inherited, owned before marriage, or gifts. Generally, the spouse receives no separate property. It passes to your children or grandchildren. The surviving spouse receives none of the decedent's share of the community property if the couple has children. Your community property will go first to your children. If you do not have children, your spouse will receive your community property. This comment addresses spouse and children only. For the full picture of intestacy in Louisiana an internet search will provide numerous articles and sites that discuss the details.
If the property was conveyed to a sister by deed from her father then she is the owner of the property regardless of whether the father is living or deceased. Deeds have no other "meaning" except to convey property to the grantee on the deed unless other intentions are clearly stated in the deed. Father should not convey the property to one child if he really wants all his children to share in the property. By executing a deed to one child he is telling the world his intention is to transfer ownership to her alone. If father is deceased, unless you have written proof that your father intended that your sister was to hold the property in trust for all his children then you are out of luck. The grantee on a deed is the owner of the property unless there is written evidence convincing enough to persuade a judge to rule that others have an interest in the property.
I don't know what country you're talking about but there is no such law in the US. When a person dies, his or her property will be left to whomever is named to receive the property in the will. if there is no will, the property will go to the spouse. If there is no spouse, the property will be inherited equally by all children of the deceased. If there are no children, no spouse, and no will, then I'm not sure.
If the property was in your mother's name alone and she died intestate the property would pass according to the laws of intestacy in your state. The children may be entitled to a portion. You can check your state at the link below.
Yes, if they are named in the will. Or if the will leaves the money to you or your descendants. If your husband is not their father, there is no automatic right to the property.
You need to go to a law library in your jurisdiction and read the law. It will tell you when it became effective.
If your father transfers his property to a trust that would get it out of his estate and out of reach of his heirs at his time of death. She may be seeking to disinherit your father's children.