waiver word for word, including the title, explaining it as he read it; that he told her that the law was uncertain and that it would be difficult in this case, because of the manner in which the property had been acquired, to determine what part was separate property and what part community property, but that whatever it was the waiver covered the entire estate; that he told her that if she signed the waiver she would receive the income from the entire estate while she lived, and that after her death annuities would be purchased for her son and grandson and the rest of the estate would go to the three granddaughters; that he told her that this "would be a waiver of all her interest inthe estate, whether it was separate property or whatever kind of property it was" and that "if she signed this, it covered the entire estate, both Mr. Opp's interest in it and any interest which she might have in it," except for the home and the right to a family allowance; that he then asked her if she understood this and if it met with her approval and she replied in the affirmative; and that Mr. Opp then executed the will and Mrs. Opp then signed the waiver, which was witnessed by the same persons.
 Not only does it appear that Mrs. Opp signed this waiver voluntarily and with the intention to accept the provisions of the will as covering all of the property owned by herself and