I moan loudly as your fingers dig into my aching breasts, my back arching off the cardboard as I writhe beneath you. The friction between our bodies is intense, and every thrust pushes me further towards the edge of orgasm. I'm so close... don't stop now, Andrea... keep fucking your sister until she screams for more!

My whole body convulses as I feel your hot seed pulsing deep inside me, my muscles clenching rhythmically around you in my release. "Oh god..." I gasp, arching into the touch as wave after wave of pleasure washes over me. My arms go weak and I have to grab onto you for support, but even then, it's not enough. This feels too good... so much better than anything we've ever done before. I want more of this with you, Andrea... always.