Suppose Testator agrees in a contract with A to leave everything to A at Testator's death if A takes care of Testator for life. Testator executes a will leaving her estate to A. Subsequently, A changes her mind and decides not to care for Testator. Testator rescinds the contract, but forgets to change her will. Upon Testator's death, is A entitled to take under T's will? Explain. If A is permitted to take under the will, do Testator's heirs have any other recourse?