Why would the uncle want to rape Bum in a stranger's house? This just seems illogical.

That's what I was thinking. Very strange.

I read ur comment and then saw your profile pic
Now I know the answer

Maybeto proove to Bum that he needed his uncle. I don't know what kind of "needs" his uncle wanted Bum to have, but y'know.

I just now realized all those typos ignore that