Bugs in the night

Adam was sleeping with May in our bed; I was in the little bed in the extra room. I awoke with her standing over me. "Adam and I are covered with thousands of little bugs--more on him than on me," she said. I got up and followed her to the bed. We're just a few days past a full moon and the snow cover sent a fair amount of light into the room. She pointed to the bed and the walls and said, "See? What are those?" I didn't see anything. I turned on the bedside lamp. Everything looked normal. "I don't know what to say..." she said. This morning she came in and asked if I slept well. I said I did, except for the bug hunt. She looked confused and I told her that she had seen bugs last night on her and Adam, the bed and the walls. "Oh yes," she said, "what were those?"