Aftermath

We stand there, breathing hard, the hot water cascading over our intertwined bodies. Sam's fingers trace lazy circles on my back while I kiss her neck, still reeling from the intensity of what just happened.

"You know," she whispers, her voice husky, "I've been wanting this for so long. Every time I visited, watching you with Meg, I'd go home and touch myself thinking about you."

I pull back slightly to look into her eyes. "Really? All those family dinners, Christmas gatherings..."

"Especially that time at the beach house when you came out of the water in those tiny swim trunks," she says with a wicked grin. "I nearly came right there on my beach towel."

I laugh softly, my hands sliding down to cup her ass. "I had no idea. You always seemed so... proper."

"That's the fun part about being the 'good sister,'" she says, pressing her body against mine again. "No one suspects what I'm really thinking."

My cock, still sensitive from our intense fucking, begins to stiffen again against her thigh. Sam notices immediately, her eyes widening with delight.

"Round two already? You really are something special, Dan." She reaches between us and wraps her fingers around my growing erection. "I think we should take this to the bedroom, don't you? More room to... play."

I nod and turn off the shower. We step out, water dripping from our bodies, and Sam grabs two towels from the rack. As she dries me off, her hands linger on my chest, my stomach, my cock.