Your a boob man at heart aren't you John?

Your eyes quickly move back up to her breasts and your fingers gently pull at the thin lacy straps on her shoulders... You slowly work them off of her, using just a finger nail so as to not wake her...

"Almost... There!" You whisper in your mind, trying to control your breathing as you manage to free the straps from her shoulders...

Now all that remains is to free her breasts...

You use your finger to gently pull on the material in between her large tits... The soft skin of her breasts begins to come into view as you pull it further and further...

"Just a bit more..." You tell yourself, your eyes rapudly moving between your sisters tits and her face, praying she stays asleep...

Finally, the material seems to give, and it slides down her smooth skin with ease, revealing her perfect large breasts for you to see!

Your cock is harder than a rock as you gaze hungrily at her exposed flesh...