Stepsis Gives Me A Helping Hand

My stepsis, Bunny, wants to join me at the costume party tonight and will do ANYTHING for an invite. She finds me in my bedroom and hops up on the bed to ask if she can go with me. I don't know, since she is my little stepsis, and she doesn't run with the cool crowd, but she seems like she'll do ANYTHING to get that invite. Bunny takes off her crop top and jean shorts to reveal a matching green bra and panty set that she shows off, hoping it will make me want to take her to the party. I am still not sure, though, so I tell my stepsis to try a little harder, and so she grabs my hard **** and starts stroking it. My stepsis definitely wants to get to that party, and she'll grab any opportunity to do that, including my ****. She strokes it as it grows harder and harder, bringing me right to the edge, then takes off her top to rub her tiny **** on my **** before stroking out a big load as she looks on with interest. But, even after that handsfree *******, I am not certain I want to take my stepsis anywhere, so I tell her to go find another costume to show me...