Sometimes when the characters are not fully human they can't digest human-like actions. So maybe he swallowed some of MC's saliva and since he couldn't digest it he had to spit it up... Idk works on vampires '-' Besides he is gigantic! And and those tattoos idk..
ONE OF THE BEST SMUTS I'VE EVER READ.
FR ALL THE SMUT SCENES ARE SO HOT AND DETAILED AND UGH I LOVE THEM.