Dumbledore returns to Privet Drive and sits with Harry and the Dursleys…

(Btw , the chapter title is reminiscent of first word we hear of Dudley Dursley's in the books (NB while it is "won't" in the US edition, the word is "shan't" in the original UK book). Here, however, "won't" is a reference to the house-elf Kreacher's reaction. ”Will" refers to Sirius Black's last will.