My Adopted Son the Rally Driver (1971)

Manolis, a clumsy but well-intentioned coffee-shop waiter, is fed up with his abusive boss, Agisilaos. To spare himself further humiliation and, of course, pain, Manolis enlists the help of his assertive mother, Dora, only to make things worse. Now, Agisilaos is head-over-heels in love with Dora, who, unable to fend off the ripe Casanova's romantic advances, decides to present her perpetually semi-inebriated brother-in-law, Alexandros, who poses as her long-lost husband. Then, unexpectedly, Manolis turns his luck around. Will the once-unfortunate employee make his dreams come true, and get the girl?