W'lakena Shay'an ma Yabqa (1984)

But Something Remains

Aziz and his mistress Zinat are able to con an orphan, disabled and wealthy girl called Mona to seize her property. They think of a plan and pretend that Zinat is Aziz's sister and he succeeds in marrying Mona and gets a power of attorney to manage her property and then falls in love with her.