In the soft glow of late afternoon, the grandparents' home fills with the rhythmic sounds of their lovemaking. The grandfather's thick, veined cock stands at attention, a testament to their enduring lust. His wife, her body a map of their shared history, takes him in her mouth, her tongue swirling around his tip, tasting the precum that beads there. He groans, his hands tangling in her hair, guiding her as she works his length with her skilled mouth and hands, their bodies swaying in a dance they've choreographed over years.