Sentence:  "Oh, I see," murmured Maddie. She didn't see, though. Not really. Why cry over a ladder in your tights? ... "They must have been defective," she said. / "No, they weren't! It's "me" who's defective! I'm too fat to wear Mediums any more. That's why they <WSD>ladder</WSD>. They <WSD>ladder</WSD> the moment I put them on, because my legs are too fat. Everything is too fat!" Joanna shot her mother a baleful glance that brimmed with threat. 
Meaning of the word marked with <WSD> tags:  (to knit) Of a knitted garment: to develop a (id=knit) as a result of a broken thread.