In just one of her bestever functions, Julia Roberts is Grace, whose reaction to the infidelities of all Eddie (Dennis Quaid) turns the lives and loves of those people round her to something like falling dominoes. Robert Duvall, Gena Rowlands, Kyra Sedgwick and other people from"the year's greatest ensemble of figures" (Jack Matthews,'Newsday') co-star Inside This succulent, frank story written by Callie Khouri