My step sister's alluring lingerie and sensual cupcakes enticed me

I had no idea what was in store when my fabulous stepsister showcased up at the gym, unveiling her perfect caboose and sugary-sweet boobies thru her see-through lingerie. As I struggled to struggle back her seduction, she skillfully gave me a mind-blowing palm job before riding me rock-hard in both cowgirl and change sides cowgirl positions.