I'm glad you thought Willie Scott was funny.
At the end of the movie, Willie Scott seemed believably eager to get away from Indy, but Indy used his whip to reel her back in as if he was a fisherman reeling in his catch. That made no sense to me, especially considering this dialogue earlier in the film:
Willie Scott: I hate the water, I hate being wet, and I hate YOU!
Indiana Jones: Good!
I would have thought that Indy would be glad to be rid of her at that point, but I was wrong, and I could not see what Indy saw in Willie at that point.