This is such an excellently-written POV! You show us Petunia's world, making us understand without either apologising for her or judging her. The bleak atmosphere of Severus's pipe, Petunia's bitterness, her inability to place her feelings, her love for Vernon (of course he's a "sweet man" to her, the escape from the world that confuses and excludes her) -- all of that comes across perfectly.