Absolutely. Risks are what make life worth living.

I figure it can't hurt to go for an encore performance. I grab my dick, and guide it to the entrance to my sister's pussy, slipping it between her lips. I know I have to be really careful, with Megan pressed up against me as she is, so I ease myself in and out of my sister slowly. I feel Becka start to stir, then see her open her eyes. "Dan?" she asks a little groggily, as she looks over her shoulder at me. "Shhh." I whisper, then gesture behind me with my thumb. She looks and sees Megan, then looks back at me. "Alright. But make it quick." She whispers with a hint of lust in her voice.

That's all I needed, as I set a slow but steady pace. Now that I've experienced the absolute magic that is my sister's pussy, I don't think I can give it up. I'm completely hooked. I piston in and out of her for about ten minutes before I'm ready to blow. Based on how things ended last night, I don't even bother warning Becka this time. I empty myself inside my sister for the second time ever. As soon as I pull my rapidly deflating dick out of her, Becka gently slips out of the bed, and tiptoes over to her own bed. She reaches into her bag, and pulls out a bathrobe. As she passes me on the way to the bedroom door, she sways her hips suggestively, before disappearing.

A few minutes later, Megan wakes up. When she sees me staring into space, she asks "What's got you thinking so hard this early in the morning, honey?" I turn my head toward her quickly. "Huh? Oh, nothing."