Yes, and she's been awake the whole time

Before I had the chance to contemplate any further possibilities, the answer was suddenly revealed. After letting loose that moan, suddenly Alice's eyes opened wide and she gasped. Putting a hand over her mouth, she just stared at me. There was panic in her eyes, along with a healthy dose of fear.

Likewise, I was a deer in the headlights. With my face still buried between her legs, I couldn't turn my head without touching her bare skin. I was keenly aware of where exactly I had thrown away her underwear when I stripped her, and how much attention I had paid to her breasts.

"Um," was all I could think of saying, like an idiot.

"Um," was all that Alice could respond. And there we were, the strangest couple in the strangest silence.

I tried my best to read my sister's face to see how the situation would unfurl. Was that anger in her eyes? But if so, why did she let me go that far? Did she want me to continue?