Stepsister Wanted PAINFUL Anal Before Her Boyfriend I Stretched and Pounded Her DEEP

My athletic blonde stepsister came to me nervous and desperate. She had never done anal before and her boyfriend wanted to fuck her ass hard that weekend. She begged me to prepare her tight little hole so she wouldn't ruin everything. I started slow with the smallest anal plug, watching her face as it stretched her for the first time. Then bigger ones. Different shapes. Longer. Thicker. I worked them in and out while she moaned and pushed back, getting wetter every time. She kept saying make it ready for him stretch me more. When the biggest plug was fully inside and her hole was open and pulsing, I couldn't hold back. I pulled it out, lined my cock up, and pushed deep into her freshly trained ass. She gasped, grabbed the sheets, and took every inch. I fucked her hard and deep, using her for the first time while she was still supposed to be saving it for her boyfriend.