@Weirdo well, Josh scent is almost non-existent and he took suppressant regularly. Mark i think assumed that Josh is beta like him since his build and strength is not for omegas. Mark specifically told him(C and secretary) that all of the bodyguards are alphas and betas, so Chase assumed too. althou Chase has little doubt after smelling Josh i think in chapt 14 when he poured that beans for his dinner..
I love you 💜
