Forbidden Fruit (1979)

Two high school students, Satria and Rani, have tasted the forbidden fruit of sex. But Rani’s father, a rich man, who is authoritarian and very proud; is against Satria, who is merely the son of a poor widow. He regretfully has to give permission for his only daughter, Rani, to marry Satria who has impregnated her. He allows this without any celebration and on condition that they will not be sharing a house, and that they will divorce after the baby is born. Everything changes when Rani gives birth to a pair of twins. Rani and Satria can be reunited.