When you marry an NPC eventually they give you a stardrop. Does the same or something similar happen if you marry a player character in co-op? Or to get that stardrop do we need to marry NPC's and then divorce them after getting the stardrop?
When you marry a player both of you get a gift box (similar to the parsnip box at the start of the game) which contains a stardrop. You can only get 1 marriage stardrop though -- if you had one from an NPC, you won't get the one from a player for example.