Butter up

Justin grabs a tub of melted butter from you and goes to one side of your step sister Gwen. He dips his hand in and begins rubbing down her back as if it was suntan lotion. Justin's eyes are rolling back into his head as he starts to get a hard on and drools down his shirt.

You laugh at your friends reaction to touching Gwen. You then notice her looking at you with an almost longing look in her eyes.

Gwen begins to tease you stating: "Come on don't let Justin here have all the fun! I want to be rubbed down by two guys tonight, or are you not into girls?" She would always make a gay joke at you when ever she came out of the shower and you would turn away. Though you did that to hide the boner you were getting seeing her in nothing more than a towel.

Now you have a full hard on from just seeing her naked form before you. You step up and kneel down next to her and begin rubbing melted butter onto her foot and leg while letting Justin have the other.

Suddenly you are surprised by what Gwen does to you.