Sister Sister

This was essentially along the lines of watching a tv drama play out in a book. Sister once dated this Mr.Whitaker, then loses him to her sister who marries this man and then shows up unexpectedly on the Fourth of July. Talk about a firework show. I couldn't help but laugh throughout reading this just because of how ironic and funny it was to me as I continuously connected this to many tv series that I see commercials for or movies. In a rather boring life for Sister, things heat up when her sister, Stella-Rondo shows up with her adopted daughter. Things heat up because there's a rift between the two sister. This would lead to the eventual split of the household. Not so much a split, but just Sister electing to leave. Stella-Rondo ends up being the one who elects to turn the whole house against Sister. Stella-Rondo tells Uncle Rondo that Sister thinks his appearance is ridiculous. Thus angering Uncle Rondo and leading him to throw a pack of firecrackers in Sister's room early in the morning. Angering Sister and this was the last straw as Sister would then move into her place of work, the post office. The family claims they will never step foot in the post office, this was a response to Sister taking a couple vases. Sister informs Stella-Rondo that without the post office, she can't stay in touch with Mr.Whitaker. My question, who really gets the last laugh?