I invited my brother to my wedding but deep down I don't want him to come.
Why wouldn't you want him to be there?
He is too unpredictable. He is the type of guy that has no problems showing strangers his penis, and I am afraid of what he might do a silly prank at the wedding. 
He is still family though. People at the wedding might start to wonder and start gossip.
Actually the truth is he tried to slept with my fiance. Luckily she denied him and did the right thing.
Wow, okay. I'm thinking that he might bring toxicity to the event. Maybe it is best that he doesn't go to the wedding. I think you might be in the right here.