Mailed by my gag-loving stepsister!

I'm getting ready for a night out flirting with the boys when my stepsister enters my room. She's holding a video camera filming me as I'm sitting there putting on red lipstick in front of the mirror. The only problem is, the lipstick is my step-sister's and I'm using it without her permission. Stepsis got me on tape and there's no way I'll be able to talk my way out of this. She gets so mad at me for taking her lipstick without asking her first and tells me to give it to her. In the past, I've learned never to argue with my stepsister because she's so dominant and always gets her will, so I hand her the lipstick without putting up a fight. Stepsis tells me that now she's caught me on film she might as well go tell stepmom that I'm a little crook and that I'm flirting with boys. I plead stepsis not to tell stepmom because that will definitely get me grounded for at least a week! Stepsis listens to me and says that she won't tell stepmom if I accept a bit of humiliation...