After a couple of seconds, he understood that what he was smelling was the liquid that was making Carla's opening and labia shine. Knowing that it was the scent of her arousal only added to the appeal of its slightly musky and somehow sweet overtones, and made him eager to find out if her juices tasted as good as they smelled.

Extending his tongue, he drew the end of it across her opening and got his first taste of essence of emale-and fell in love with it. Carla's taste wasn't exactly the same as the smell, it was somehow better. He repeated his actions, and extended them by drawing his tongue up between his sister's labia for a little ways. Another pass of his tongue ended only after he'd made careful contact with her clitoris, which drew a soft noise of pleasure from her. Robert didn't think anyone else could see what had happened, but he'd felt Carla lifting herself up slightly to increase the contact between his tongue and her pussy… something that told him she liked what he was doing.

Carla had felt mixed emotions as she'd watched Robert's face approaching her pelvis. That she'd finally find out if having her pussy "eaten" was as good as it sounded like it would had her feeling eager anticipation, while she was deathly afraid that her brother wouldn't find her taste and smell as appealing as she did. Much to her relief, his reaction after his tongue touched her the first time was enough to reassure her that she wasn't gross or disgusting there. When he'd progressed to touching her clitoris with his tongue, she couldn't help trying to increase the pressure at least a little bit. She hadn't been masturbating that long, but she'd definitely learned how much pressure felt best to her.

Though she hadn't meant it as a signal, Carla knew that Robert had noticed what she'd done when his next contact with her clit was firmer than the first; since the second wasn't as firm as she liked, she tried pressing herself up again.