Emma entered into an oral contract with her uncle Aiden, in which Emma promised to take care of him for the rest of his life and Aiden promised to leave his house to her under his will. That house was worth $300 000. Emma performed her end of the bargain by spending $5000 to care of her uncle before he died. Upon his death, she was disappointed to learn that his will did not leave the house to her. Emma thought about suing her uncle's estate for breach of contract. However, her lawyer explained that such an action will fail because while the contract is valid, it is also unenforceable. What claim, if any, does Emma have against her uncle's estate?