I won't say he rape him, it more like they both got into heat stage - like both took drugs and didn't know what they doing cause they got into heat. but Issac was the one that got him into heat first so...XD you can't really blame any of them in that situation. they both follow what they can't control
I don't think you get what Omegaverse actually means if you answer like that. I'm not going to start explaining what this world means, you should read a wiki about it - https://en.wikipedia.org/wiki/Omegaverse
but I say this again it isn't raping if both parties could not control their instincts like taking drugs. if both took drugs and had sex is it also rape? that BS!
Issac is an omega for the first time in his life and Felix rapes him annnnnnd gets him pregnant like woooow
*slaps Felix*