Carlissa jumped when Michael came unexpectedly from behind and suddenly grabbed her breasts, and started to play with them. She giggled and put her hands on top of his as he moved them around. "Oh, you know them... Always growing!" she said, refering to her breasts. Carlissa's breasts were indeed rather large, and were already as big as her older sister's breasts. They have been going through a rapid growth spurt  ever since she turned 15. She constantly has to buy new bras because of their increasing size, which has drained her allowance entirely.<br/><br/>Carlssa was rathr dissapointed when Michael let go of her breasts. So, when he sat down again, She scilently slid under the bed and crawled over to her big brother's dick, where she gently grabbed and started to kiss it on the head. She genty stroked the top of his penis with her right hand, while two fingers on her left ticked the bottom side. To think that ths penis may one day impregnate her...<br/><br/>When the penis was hard enough, Carlissa slipped her mouth over the semi-hard rod, and started to move her head back and fourth. She gently sucked the dick, not enough so that Michael would have an orgasm but just enough so that it would get to its maximum length. She rubbed her tongue along the bottom side of the penis, feeling it grow inside of her. Finally, when the penis had grown to its maximum length, she pulled out, and clamped her breasts onto Michael's member, so that it was between her enormous boobs.<br/><br/>"You keep saying that my breasts keep growing, right big brother?" Carlissa asked. "So by how much have they grown?"