Amy promises in writing to pay her cousin Edgar, who is dangerously obese, $10,000 if

Edgar loses 100 pounds within eighteen months. Edgar agrees, and undergoes an extensive

weight reduction program under his doctor's care. Edgar loses the weight within the agreed

upon time, and fees much better. He contracts Amy and asks for the money. Amy refuses to

pay, alleging there was no valid consideration for it, and Edgar is much healthier now, which

is the most important thing. Edgar files a suit against Amy. In whose favor is the court likely to rule, and why?