Alice was aware that it was possible that her sister might still not be able to finally cum. She had deliberately not offered her sister the biggest dildo or her personal favourite, thinking that she could always introduce them later if her sister was still struggling. Carol was certainly not struggling; she was loving every second as she rode the vibrating dildo. She had taken her sister's advise and forgotten about trying to cum.

Adam increased the power of the Sybian and Carol sucked in a deep breath, and then exclaimed,

"Fuck that is so good. It is not going to make me cum, but it is truly wonderful."

It...