We Who Are(Bound In Blood)

"Blood, spit, and bone." Aamon lists and finally rises from the floor towering over Elias who is still curled on the couch. "And of course a promise after they have been exchanged."
"Exchanged?" the mage echos after a long beat of silence. Aamon smiles,
"A kiss." he clarifies, his grin growing wider as Eli pales, "Much simpler than making a drink of blood and saliva and pulling out a tooth...well, it would be unpleasant. A kiss is much easier."
"A kiss," Elias breathes. Aamon leans down bracing one of his hands on the back of the couch and the other on the arm of the couch beside Eli's head.
"Precisely,"

From the prompt - "So I tried summoning a demon but it never appeared, obviously a failure. So why are my dishes clean, my clothes folded, and my doors opening when I go to walk through them?"

Only I took it a little too seriously...