She announced today that she was staying home because she noticed adult ones in her hair. She got them from her school-aged son. This is his third infestation and AFAIK her first. Five days ago, we were all at a team lunch. I sat next to her on a bench and our coats made light contact. I am very annoyed right now and am doing some half measures (laundry in hot water, oil in the hair) as we speak. It's slightly more complicated because I'm pregnant and can't just run out to the drugstore to get the OTC shampoos as most are contraindicated for pregnant women. The incubation period is 1-2 weeks, right? How much longer until I know for sure? Thanks.