"Aren't you going to . . ." Nicole said.

"Nope," I said, sitting down and getting comfortable. "I'm just going to watch."

Nicole seemed a bit nervous as I watched her with a confident smile. But then Tessa leaned forward, nuzzling Nicole with her bound and gagged head.

"Oh, sis," Nicole said, almost sadly.

Nicole took Tessa's head into her hands and kissed her cheeks, her neck, and then licked at her taut nipples. She took Tessa's breasts into her hands and licked and sucked, and I had a feeling this much had happened before.

Nicole took it slow, working Tessa's restrained body over with gentle fingers, and I knew...