Catherine, wife of Czar Peter III (1762-1804), was assassinated in 1762. Rumors tell that Czar Peter III was behind this and it is no secret he hated his wife Catherine.
Now Peter III was not a bad Czar. He fought and beat the Danes in 1762-1765. He formed an alliance with Prussia (God knows why, Prussia was almost defeated in the Seven Years War...), which antagonized Austria in a permanent Austro-French alliance and he beat the Ottoman-Crimean Forces in the war of 1787-1794, making the Crimean Khanate and Moldova Russian Vassals rather than Ottoman Vassals.
Assuming Catherine was not assassinated... There is a likely chance that it would turn against OTL Peter III, how would she or her son Paul rule Russia? Would it be better for Russia or turn worse?