Even though Carla didn't know what to expect when Robert's hands reached her boobs, what she felt still surprised her: somehow, even though it was still just a pair of hands much like her own, his hands somehow felt different than when she did it. His touch felt… better, somehow; and she liked it.

Despite the thrill of having a pair of real naked tits in his hands, Robert managed to keep sight of the fact that they were Carla's tits. So when he started giving them some exploratory squeezes and saw her grimace slightly, he immediately reduced the pressure he was applying so he didn't hurt her. It took him only a moment to decide that he really liked breasts-particularly Carla's. They were somehow soft and firm at the same time, and delightfully smooth and warm in his hands. He happily spent considerable time just running his hands over them, gently squeezing them, and enjoying how they felt in his hands before moving on to find out what he could about her nipples. To his surprised pleasure, he found that he could softly tease the firm cylinders and roll them between his fingertips and get them to grow even longer as he watched the dark brown rings surrounding them pucker in sympathy. It was a fascinating sight to go along with the more tactile pleasure he was getting.

Other than a single brief bit of discomfort, Carla was pleased with what her brother was doing with his hands: his touch was as gentle as she could have wished for, and he was somehow able to bring out sensations in her breasts that she'd never experienced on her own. Then when he started playing with her nipples, those feelings increased even more, and she could feel her nipples grow longer and harder under his ministrations. Completely forgetting that it was her own brother molesting her, and that the two of them had an audience, Carla felt herself begin to get aroused from what was happening to her developing mammaries.