A/N: This would be the REAL ending to this fic. Happy April Fool's Day!!. (Or day after, really... XD)
Tonks apparated back into Headquarters and traded grins with Sirius and the metal werewolf next to him.
"Think they fell for it?" Sirius asked.
Tonks' smile turned decidedly evil. "Certain. Ever going to tell them the truth?"
"Only after they've made complete fools of themselves. It's their own fault they forgot what day it is."
Tonks and Sirius' laughter was joined by a rather metallic-sounding howl.