e*spon*si*ble adj 1: trustworthy, reliable, dependable 2: the one thing Griffin Cahill is not. Griffin Cahill plays too hard, dodging commitment any and every way he can. His ex-fiancee, pediatrician Heather Delaney, works too hard, for essentially the same reason. Everything changes when Griffin's twin nephews come to stay. The babies are more than a handful, and for the first time in his life Griffin needs help -- which Heather is extremely reluctant to give. Helping Griffin take care of the boys will mean moving into his house and becoming part of his life. That ended in disaster once. And she's too smart to let it happen twice. Isn't she?