Rodney and Donna Mathis (Mathis) filed a wrongful death action against St. Alexis Hospital and several physicians, arising out of the death of their mother, Mary Mathis. Several weeks before trial, an expert consulted by Mathis notified the trial court and Mathis’s counsel that, in his opinion, Mary Mathis’s death was not proximately caused by the negligence of the physicians. Shortly thereafter, Mathis voluntarily dismissed the wrongful death action. Mathis and St. Alexis entered into a covenant-not-to-sue in which Mathis agreed not to pursue any claims against St. Alexis or its employees in terms of the medical care of Mary Mathis. St. Alexis, in return, agreed not to seek sanctions, including attorneys’ fees and costs incurred in defense of the previously dismissed wrongful death action. Subsequently, Mathis filed a second wrongful death action against St. Alexis Hospital, among others. Mathis asked the court to rescind the covenant-not-to-sue, arguing that because St. Alexis was not entitled to sanctions in connection with the first wrongful death action, there was no consideration for the covenant-not-to-sue. Are they correct in this contention? Explain.