yes weak was a weird one, because often weakness is really the opposite, like you say. Like I was also thinking about someone crying, but "showing feelings" in that way can also be seen as a strength..
For me your girl looks more courageous and strong than weak, but that's the great duality ;)
I was happy my partner gave me the idea about orchids, I accepted that immidiately!
I really like the Orchid idea, it is a very creative and apt adaptation of the prompt ! And yes, weakness/strength is a very complicated idea, alright !