Family dramas are always tough and delicate situations that need to be dealt with carefully. But sometimes a girl’s gotta do what a girl’s gotta do. This is the case with this story which involves an extremely toxic sister-in-law who presents a potent mix of infantile gatekeeping and demeaning slander, which Redditors agree has to be dealt with exactly like the young woman who posted it did. The original poster (OP) of the story is a young woman, who clashed with her boyfriend’s sister Sally. S…