Remus struggles to resist Tonks but so close to the full moon, the animal is hard to ignore. HBP-based with the correct full moon cycle instead of JKR's.
Sirius surmises one of the few good uses of Muggles, Tonks has an important question about sexuality, and Lupin's lap serves a good purpose. Silly fluff, early OoTP era. Rating for safety.
Remus deals with the night before a full moon.
Remus makes dinner, Tonks distracts him, and it is all a way to forget that trouble is approaching.