CAIRO- Egyptian President Hosni Mubarak is scheduled to discuss the efforts to revive direct Palestinian-Israeli peace negotiations with Israeli President Shimon Peres in Cairo on Sunday , a spokeswoman from Peres' office in occupied Jerusalem confirmed. Israel Radio quoted senior Israeli officials as saying that Mubarak understands the coming months are critical for the future of the peace process. Indeed, the four months allocated to US-mediated indirect "proximity" talks will end in September, as will a partial 10-month moratorium on Israeli construction in the West Bank. Palestinian President Mahmoud Abbas, in Cairo on Thursday to brief an Arab League committee dealing with the peace process, has said he sees no justification for starting direct talks without any progress made in the indirect ones mediated by US envoy George Mitchell. Abbas is, however, under heavy American and European pressure. Washington and Europe want direct negotiations to start before the partial settlement freeze expires on September 26. Netanyahu told visiting Spanish Foreign Minister Miguel Moratinos he would not be able to extend the settlement moratorium because that would bring down his coalition.