The Open Window Summary. Mr. Framton Nuttel has just moved to a new town. While visiting one of his sister's acquaintances, Mrs. Sappleton, he spends some time with the woman's niece, Vera. Vera recounts a story about how her aunt lost her husband and two brothers in a tragic hunting accident.
Well, using my limited knowledge, "cleaving" means to chop, break in half, split, etc. Twain means twice. So, perhaps it's like "you've broke my heart in half", something along those lines? hopefully this helps you.
