She'll just watch

"I, uh...I'll just watch," Nat mutters. Anna shrugs.

"Suit yourself," she says. Nat drops into a big beanbag chair a few feet away from the bed, blushing and looking away as Anna walks up to Beth and begins to run her hands over the big-titted girl's ass, squeezing and lightly slapping it. Beth gasps under her ministrations. "What a little slut," Anna says with a laugh. "Let's see, you ready?"

She licks two of her fingers and, as Nat watches{if Sluttery < 20}, wide-eyed{endif}, runs them lightly up and down Beth's folds. Beth moans and Anna does it again, this time parting her labia slightly to get a look at the hot pink cunt underneath. "Mmm. Nice little cunt. You taken a lot of dick?"

"Mmhm," Beth moans, wriggling slightly under Anna's touch. Anna laughs and plunges a finger an inch or so into the other girl's slit, making Beth gasp and arch her back. Her large breasts press into the comforter as she tries to get her pussy higher, pushing back onto Anna's hand.

"Well, plenty more where that came from," Anna says with a giggle. She crosses to her bedside table and pulls a harness from below it. Nat's eyes widen as Anna grabs one of the larger dildos that Beth was deepthroating earlier and pushes it into the slot at the front, making her plan clear. Is she really gonna...

She is. Anna steps into the harness and pulls it up, cinching it quickly around her thighs and waist. Kneeling on the bed behind Beth, she smacks the bigger girl's ass. "You ready for my cock, little bitch?"

"Yes, Anna! Please," Beth whines. Anna grins and winks at Nat, who's watching with her jaw dropped.

"You a good little slut, Beth?"

"Yes! Yes, I'll be a good slut, Anna. Please, fuck me?"

"Whose good little slut are you?" Anna hisses. She's using one hand to rub the dildo up and down Beth's soaked pussylips, and reaches forward to grab the brunette's hair with the other.

"Yours, Anna! I'm your slut!" Beth pleads.

"Good whore," Anna growls. Thrusting forward suddenly, she sinks the entirety of her cock into Beth's soaked tunnel. Beth lets out a howling moan as the huge dildo stretches her, gripping the sheets as her body immediately begins to tremble. Anna, grinning, doesn't relent until the dildo is seated fully inside Beth's cunt. Nat notices Anna grinding against the base of the dildo, rubbing herself through her jeans against the blunt end while driving it deeper into Beth. Beth begins to gasp rhythmically as Anna finally withdraws, then begins slamming her hips into Beth's again and again.

"What do you say to me, bitch?" Anna cries.

"Thank you! Thank you Anna! Thank you for fucking my cunt!" Beth gasps. Anna laughs, eyes wild with delight.

Nat is staring, mesmerized. She's never seen Anna like...this. And she's never seen a girl do that to another girl, either. The very sight is getting her all hot and bothered, and she can feel her hand drifting, of its own accord, down toward her crotch. She wants to touch herself. But...will it be weird if she does? She can't help but be turned on. Should she join in visibly? Or try to hide?