It's going to take some time. They will soon discover Chase's health condition, and then it will be oriented to Josh stay away from Chase since Steward thought it would be better without him interacting with omega pheromones. Grayson will come for Josh just because Chase enters in a rut and refuses to have sex with anyone else, but we have some chapters before any of that happens

So much fluff.
Spoilers question to novel readers below
But I have some weird memories from the novel, when are they gonna be separated and Greyson will come for Josh?