
Actually, in one of the chapters, he is concerned about another Beta turning into an Omega if she is exposed to too much of Keith's pheromones. So that apparently is also common. Though I am curious how they explain that. Does that mean that those male betas grow a uterus or do all men have one to begin with? I wish they would explain that a bit better.

Sorry to all commenters on this post. I noticed a grammar mistake in the original post and I am a bit of a perfectionist. I went to correct it and didn't realize that it would delete the comments in doing so. But now I know.
Someone said that they thought that the Omega here was a special case in turning from a Beta into an Omega, but in an early chapter they state that is something that happens whenever a Beta is exposed to too many Alpha pheromones and at one point the MC even worries about a female Beta becoming an Omega if she keeps getting exposed to Keith's pheromones.
Well that is a unique twist. For once it is the alpha that is tied to only one partner and the omega that is unmarkable and can completely change partners anytime. I actually kinda like that. It is like a defense mechanism for the omega's and gives them an advantage. This way, even if they are marked during a rape, they are not bound to their rapist for the rest of their lives. I like that. Though it is also interesting that Betas can be turned into Omegas when exposed to too many alpha pheromones. I want to see more stories in this specific version of omegaverse....