Sis, I'm ready

Scrawled in Roxy's handwriting, the note reads, "Hey, Sis...I'm ready. Come on back." You're positive she's never called you 'sis.' It's probably her sister, Natalie, coming over for the weekend. Natalie is taller than Roxy, but blessed with similar good looks. She has avoided the sun more than her sister, making Natalie a creamy, pale beauty. She's not the goth that Roxy claims she used to be, but Natalie has definitely retained traces of her misbegotten youth with red highlights in her greased down black hair. Her eyes are a soft pale green, and though her tits are more modest , they are a still a perky C cup. But her ass and thighs counter the otherwise gaunt frame of Natalie's lithe figure. Again, not as impressive as Roxy, but a meaty handful all the same.

You go back to see if Roxy is still in, to let her know that her sister hasn't arrived yet. And as you walk a stray thought hits you.

"Roxy only ever says 'come on back' to people she's going to fuck..." you remember. Of course, you rationalize, she couldn't have meant THAT for her sister. Surely it was just a simple gesture.

Still, the thought of the two of them scouring each other's bodies' with their lips is an all too pleasant image. With each stride, you feel yourself growing slowly at the thought of this forbidden tryst.

It's probably all in your head, you tell yourself as you open the door to see if Roxy is there.

When you look inside..