The Harmful Magic Wand

Once, the Lord sent a piece of cheese to the crow! No, not like that… One day, a parrot grabbed a bun with its beak! Now that sounds more like the truth. This is where it all started. Stepanida Kozlova... was having lunch in the Montini family's country house. Suddenly, out of nowhere, something large and multicolored flew to the table, grabbed a bun, and darted away. The thief turned out to be the neighbor's parrot. Soon, shocking news erupted: after tasting the forbidden fruit, the parrot kicked the bucket, followed closely by the neighbor's old lady Varvara, who, out of her innate greed, finished the bun that the parrot had left behind. What’s most terrible — two years ago, after tasting a similar bun, Nina — the young daughter-in-law of the Montini family — died. In both cases, the dessert was clearly poisoned.
So, wait! Who keeps bringing these cursed buns, damn them? Hold on to your chair! Stepa. The darling of fortune, Stepanida Kozlova. And now she is the main suspect…