I don't really like some omegaverse story about alpha-omega siblings especially when the alpha sibling will react to their own omega sibling's pheromone and forcing themselves on the omega. This chain of events will lead to misunderstanding and eventually the bond between the siblings will be broken. Can't it be like this? :- in an omegaverse setting, the siblings will not be affected with each others pheromone even though they're alpha and omega. I only know of one omegaverse story where the omega sibling's pheromone doesn't have any effect on his alpha brother and that manhwa is called 'Heat & Run'. I really like that manhwa so much because of this reason. I really oppose incest both in omegaverse and non-omegaverse stories.
Kimi wa Mou Kamenai