The stories on this website are exactly what the title suggests - tales and write-ups of a married woman or taken girlfriend, cheating on her husband or boyfriend behind his back. Most of the stories involve the adultery taking place right under the cuckold's nose. Whether you interpret that as the cuckold being too stupid to notice, or choosing not to notice, is irrelevant.
The girls doing the cheating in these stories are not evil. In fact, they love their significant others very much, with no desire to leave them. It's just that the guy they are cheating with are worth it, each in their own unique way.
Whether you want to call them bulls or studs, the alpha males stealing away these women are the husband or boyfriend's buddy, best friend, boss or his bully.
On Oblivious Cuckold, she will always be cheating on her man with someone he knows.