Compared to a genie he just met, the father who took care of him for years is clearly more trustworthy. On top of that, Raphael is actually a demigod. Even though he's weakened, he's still way stronger than a 'fake' god like Michael.
Plus the reason he wants to kill Michael is kinda weird. His dad can't have more kids means... That seems pretty scary.
Leo didn't need even a second to think, he immediately blocked the door so Michael couldn't escape. This is a great chance to build goodwill with his dad, so he can't miss it.
???
Michael felt completely dumbfounded. Didn't expect the chosen one he hadn't even known for a few hours would betray him like this.
"What the hell are you doing? Get out of my way!"
He yelled and ran, not slowing down for a moment. But Leo's body was like an iron wall, the moment he bumped into it he tumbled onto the ground.
