This is some lame shyt right here man. Forget it being LeBron for a second and just apply this scenario for anybody.
A man is highly successful at what he does accepts this guy into his circle because he's dating his mom. Allows him to experience a lifestyle he never would've touched otherwise and things are going great. Never says a bad word about him publicly despite everyone questioning the relationship. A little adversity hits and the successful man is going through a rough patch, all the sudden this dude is threatening him and ratting his personal business out to the world without giving a second thought to the repercussions
I know it's LeBron so folks are gonna clown but c'mon man, that's foul