Even then he kept a wary eye out in case one of his siblings had randomly decided to have lunch there . Over the last day or two , Ginny 's situation had been going around in his head , and it made it all the more important that no one know about this bewildering turn of events yet . Not at least until he and Ang had calmed down enough to discuss their options sensibly . Lists had to be made .

Question: Why might one of his siblings randomly decide to have lunch there ?
Answer: Because he and Ang had calmed down .Because he kept a wary eye out .Because Ginny 's situation had been going around in his head .Because they 're hungry .