Wow she was not expecting to be that startled, maybe she did doze off slightly.
Thellim staggers up to obtain food. She is not overwhelmingly dressed, but obviously all people in professions that come to doors are all married to unusually attractive individuals or just asexual or whatever, and not concerned about exposure to unclothed people; no sensible person or preference-aggregating mechanism would order a society such that people had to get dressed just to answer their door.