Fucking and Hurting my Step Sister while she is in Study Meeting - Part 1

THIS IS PART 1. I knew my step sister was about to have her class meeting starting in just few minutes with her professor and friends. I decided to do what a normal stepbrother would do ;-). I disturb her and started playing with her sensually first, then gently and playfully grope her boobs and start spanking her hard later as the meeting goes and she takes notes. She loves getting disturbed like this.