One Song a Day Takes Mischief Away (1970)

The story is seen through the eyes of 6 year old Perica Safranek. On a family picnic Perica's mother starts flirting with Mr Fulir, a Zagreb Dandy. The father at first doesn't notice it, but wants to marry off the aunt. After a couple of invitations to their Zagreb home, the father becomes aware of Fulir's passes at his wife...