Surprisingly tough, actually.

Becca was enjoying this game. Perhaps a little too much.

The sight of Sabrina moaning and squirming on the floor was nothing short of delicious. Becca was not sexually attracted to other women. She knew that, and that truth wasn't really being challenged. But as she watched her friend struggle and moan in her simple bondage, Becca was getting really wet. Her total power over her dumb bombshell friend was intoxicating.

She had done this. Made it happen. Sure, the brunette had expressed an interest in it, and had gotten the ball rolling, but everything about Sabrina's situation had been Becca's doing. She hated to admit it but she was jealous of the other woman's body. Particularly those massive tits. But the busty girl never seemed to know how to work with what she had. Never seemed to know how to get what she wanted. Not in the way Becca did. It came naturally to Becca.

And right now, what she wanted was to watch her best friend have a whole bunch of uncontrollable orgasms. For literally no reason than because she could. An opportunity presented itself, and Becca was taking it.

But after about ten minutes of the busty woman's moans, rolling around helplessly on the floor, Becca got bored. "Okay, hold on." She grabbed the vibrator and pressed it in deeper, making absolutely sure it was in contact with Sabrina's sex. Which was soaked, so of course it had been, but Becca didn't care. "I'm adding half this time back. This didn't count."

"Whaa? No, Becca, that's not fai-AIR! Oh fuuuuck..." Sabrina gasped, anything else she'd had to say was lost to some very whorish moans.

Becca had cranked the power on the vibrator up to a much higher setting as she adjusted its position. The response had been everything she'd hoped for.