What the definition of 'is' is.

"Well," you say, thinking over your problem areas in class, "It's a little confusing that there are two versions of the word 'is' in Spanish."

The gorgeous black girl nods. "Oh yeah. 'Es' and 'esta' both mean 'is,' but you use each one in different situations." As she talks about Spanish, a little bit of a sexy accent creeps into her voice. She must have picked up a little of that from her Cuban mother. "Mainly you use 'es' for permanent things and 'esta' for temporary things."

"Maybe you can give us an example."

"Sure!" Kali stands up. "My skirt es white, but a tight skirt esta in fashion right now." She spins around slowly, giving you and Chris a great view of her ass and legs in the skirt. Your friend grins as she shifts her weight from one leg to the other to make her ass cheeks move in the tight fabric. "Do you understand Chris? Chris? CHRIS!"

"Huh?" he says, finally looking back up at her face.

"I think you need another example." She walks over to her dresser and picks up a tube. She squirts out a white gel and rubs it on her hands. "This lotion es soft and it esta on my hands."

When she's done rubbing the lotion into her hands, Kali walks over to the bed and stands in front of where the two of you are sitting. She leans over and unbuttons Chris' pants. He inhales sharply in surprise and holds his breath as she slips her hand into his pants. She pulls out his hard rod and says, "Your cock es big, and it esta in my hand. I'd better repeat that example." She uses her left hand to unbutton your pants and does the same thing to you. As you feel her soft fingers wrap around your hardening cock, she says, "His cock also es big, and it esta in my other hand."

Chris moans as she starts stroking you both. "Your... your hand... es stroking my cock!"

"No, no!" says Kali gently. "My hand esta stroking your cock!"

"Ooohhh!" you say. "I get it!"

Chris says, "Ooohhh!" too, but not because he gets it.

"I think your friend needs a little more help," says the chocolate temptress as she pumps her hands up and down. She leans forward and licks the head of Chris' rod. "Your cock es delicious and it esta," she lowers her mouth onto his dick. "en ma mouf!"

"I get it, I get it!" pants Chris as he puts his hands on her head. "Oh god, I get it so good! This esta awesome!"

Kali sucks hard, then pulls her mouth off of Chris' cock with a loud pop. She lowers her sweet lips onto your cock and gives you the same treatment. Her workouts in cheerleading practice must have given her strong lungs, because she can suck like an industrial strength vacuum!

She keeps jerking both shafts, occasionally giving more examples when she's not sucking on one cock or the other. After several minutes of this heaven she drops both cocks and stands up straight.

"So, what do you boys want to work on next"