As I was now staring at her pussy from very close, I grabbed the bottle and moved it very cautiously between my sister's pussy lips, which were literally glistening.

"Just shove it in my pussy big brother, and fuck me," she moaned, clearly turned on by the taboo incest thing, as she repeatedly called me big brother.

"As you wish," I said in a complete daze, sliding the coke bottle inside my sister's pussy and able to smell just the slightest exotic scent.

"Oh yes, shove it all the way in," she moaned.

I did as she requested, and then began to slowly fuck her with it... captivated by watching...