Knowing she was spreading Pam's juices over Ron's lovely cock was giving her a perverted thrill. She briefly considered letting him in on this bit of twisted depravity, but decided it would be best to minimize Ron's knowledge of Pam's evolving sexual proclivities as much as possible.
Ron's mind was spinning, having been jarred from the sensation of Beth's talented mouth on his dick, and the sight of her magnificently naked body, by her revelation that she knew about the locker. He didn't really know what to say, and was surprised Pam had told Beth about it, after she'd made him pledge to keep the secret, but obviously she knew....