
he is indeed a bad person. he’s a dear friend of the disgusting grayson and he was the one who created those drugs to making him feel “wrong”. like to explain it I need to spoiler more about the fear in dogs of the ml. as u may know the ml is actually terrified by the idea that he raped his dog in the past but in reality it was just a funny act that his brother grayson decided to made up and the worst part is that before meeting Josh he was fr a virgin cause whenever he went into rut that shitty doctor just shot him up with those sleepiness drugs and that was it. so he was being lied all this time just out of they’re fun SO OF COURSE THE DOCTOR IS FREAKING SUS GIRL

That's actually simple, the doctor is also a researcher. Means he it not just prescribing medicines, but also does experiments etc. ( He is also in KML whch is adapted to manhwa, so most who read that are not really surprised by how Steward acts here.)
He is the best when if comes to pheromone matters, so all those extremely rich and powerful dominant alphas go to Steward. All Millers go to Steward, Keith Pittman goes to Steward, they all do. So he doesn't lack money, what he lacks the most are test subjects and Chase is one of those. And Chase does it willingly since he doesn't release pheromones in any normal way.
Since Chase doesn't want release pheromones, he is forced to use medicine and they take his pheromones out by injection. So Grayson takes him to the pheromones parties, were Chase passes out because of the pheromones floating around. They then take out his pheromones by injections, because there is always medical staff present.
And if Grayson wouldn't take him, I'm certain that Ashley would make sure of it. And I don't think that Chase really wants to deal with his father.
Can someone spoil me about Stewart? He's really sus.