To me, who has no luck with girls, my big-breasted stepsister always kindly gives me advice. One day, I tried making a lewd request to her, and she surprisingly replied, 'It's embarrassing, so it's okay if we do it under the blanket.' As I touched her breasts and butt, kissed her, and couldn't calm my erection, I pressed my penis against her through her panties. She reacted extremely sensitively, and I couldn't hold back any longer, thrusting in and ejaculating inside her! Then, my stepsister, who was sweating from excitement, inserted my penis herself and made me ejaculate inside her multiple times!
