Some Like It Cool... (1963)

Before he finally walks down the aisle with his long-term fiancée and future wife, Lela, the bank employee, Lakis Aggelou, must first give his three sisters away in marriage. But, to make things worse, his elder sister, Rena, seems unwilling to cooperate in finding a nice husband, let alone fall in love. Is she hiding something? And for how long will Lakis and Lela have to hide their clandestine affair?