I'm published with the big five, but have an idea for an erotic romance that I think works as an e-published short work (most likely with Siren Bookstrand). In my searching I've read different things about the nature of MMF books. I'm confused if the men are "allowed" to have sex with each other because I've read that the men should be focused only on the woman.

So what's the deal? Man-man action, or not?