Tex. Prop. Code § 240.058

A disclaimer by a decedent's surviving spouse of an interest in property transferred as the result of the death of the decedent is not a disclaimer by the surviving spouse of any other transfer from the decedent to or for the benefit of the surviving spouse, regardless of whether the interest that would have passed under the disclaimed transfer passes because of the disclaimer to or for the benefit of the surviving spouse by the other transfer.