"Uh-huh," I grunted out, trying to concentrate on Tiffany's mouth.

"Use your tongue to lick his cock while you're doing that," Erin instructed her further.

Tiffany did just that, running her tongue along the underside of my shaft as her head bobbed back and forth. My dick was throbbing, and I was extremely close to bursting.

"Keep doing just that, Tiff. Greg's loving it. Now see if you can take all of him in your mouth," Erin said.

"Okay," Tiffany said, or at least as well as she could ...