You are too turned on to stop him

Your brain is screaming at you to stop him, but your body is betraying the command. Robert pushes up on the dress, and you help him by raising your ass off the desk briefly. The dress is now bunched around your hips and your pussy is now fully exposed to Robert.

"Wow. You are such a sexy woman, Mrs. Shaw. Your husband is a lucky man." The realization of what you are doing sets in at the mention of James, but it is immediately lost when Robert runs a finger up your slit. Your whole body shivers in pleasure at the sudden stimulation.

Robert raises his hand to push your hair behind your ear. Leaning down, Robert starts kissing your neck while rubbing your pussy. The pleasure is driving you crazy. You reach down and pull his belt open along with the button on his jeans. You unzip the jeans and push them down slightly along with his boxers. You grab hold of his cock and are amazed by how large it feels. He's easily bigger than James.

You realize that you are getting close to an orgasm and you tell Robert you are about to cum. He responds by shoving two fingers into your pussy and rubbing your clit with his thumb. Your body explodes in pleasure as you cum all over his fingers. As you recover from your orgasm you look over and realize the door is not locked.