If there is no will, the property will be distributed per the state's intestacy laws. In Texas, the property is given to the surviving spouse under the community property laws. If the children are not the Survivor's, then the property is split between the surviving spouse and the children. If they are minors, it will be placed into trust.
wife dies, does husband inherit everything or does he share with their children
You open an estate with the probate court. The executor of the estate can issue the deed to those who inherit.
Any property that he had will become a part of his estate. Usually the spouse will inherit it all, but there may be some provision for parents to inherit part of the property if there are no children. A will is important! And you would need to consult an attorney in Texas for specific rules.
One would surmise that whomever real estate is left to in a will would inherit it. If someone dies without a will, then the Texas Intestate Succession laws will determine who inherits the property.
If you are separated but never took the steps to divorce, you in general would inherit all property.
You can inherit property from your mother-in-law if she mentions you in her will by leaving a gift. If she dies intestate, or without a will, you are not her legal heir.
You are still legally married. In the US a wife cannot be disinherited by a will in most states. She has the right to a statutory share of her husband's estate in almost every state. If her husband dies intestate (without a will) she has a statutory right to a portion of his estate in almost every state.You can check the laws of intestacy for your state at the related question link provided below.
My cousin will inherit my grandmothers estate when she dies.
An estranged husband is married and he has all the rights of a surviving spouse if his wife dies. He will inherit an intestate estate according to the laws in the jurisdiction. He will become the sole owner of any property owned by survivorship with his wife if she dies.
You will first of all have to document that you were considered married. This may require a court order. In that case, as spouse, you would inherit the bulk of the estate.
Not legally since you never actually divorced him
In most states, a divorce automatically removes the spouse from the will. In that case the current wife will inherit most of the estate. You should consult a probate attorney in your state for the details and what must be done.