
before i read is this actually incest?

It's kinda weird at some point but it's entertaining to read. You just need to remember that they're not really siblings. Maybe they don't have any romantic interaction at the start since you know they're still a child. That's why I hope the ml knows that the mc is not his biological brother because it's mess up ( ̄へ ̄)

No, Edward and Joffrey are not blood-related. Edward is the son of the King and Madam Rose, while Joffrey is the son of the Queen and a noble from her home kingdom. This is precisely why the King despises Joffrey and refuses to let him ascend the throne. So, there’s no issue between them in that regard. Hence it's not incest at all.
why is bro sniffing his crotch