Debby looked over as she heard the door open and there they stood, their mouths agape, Tammy and Lisa. These, Debby knew, were Linda's teen sisters, both back from college for their break, one an eighteen year old freshman, the other a year older, a sophomore. The two sisters had arrived a day early, without letting Linda know about the change in plans, and the last thing they expected to see was what they were witnessing. Linda, and Debby too, were utterly shocked to see them standing there.
"Oh my god!" Lisa said to Tammy, gasping, "Look at sis! She's all naked and down on the floor on her knees!"
Linda, at 30, was much older than had her two sisters, and had essentially raised them after their parents had been killed in a crash
"Andβ andβ shβ sheβ she's licking Debby's ass," Tammy stuttered.
Debby quickly regained her composure, smiling lewdly at the two girls.
"You sister's not just licking my ass; she's licking my
dirty
ass clean," Debby said, pulling away from Linda's tongue a moment and turning her bare bottom to the girls, reaching back to hold herself open so they could look into the messy brown crevice. And could also see, under the deep pink blush of her embarrassment, their sister's face and lips all smudged brown with Debby's shit. The girls were well-aware that their older sister was gay and that Debby was her lover, but they hadn't been expecting this! They nearly trembled with shock, but they couldn't turn their eyes away, mesmerized by what they were witnessing.
"Your sister wiped your poopholes clean when you were little girls," Debby said to the two of them, "and I guess she never stopped needing to clean up a dirty, shitty ass. Except now she cleans mine, and she cleans it with her tongue."
The girls watched and, looking down, they could see a pile of big brown turds by their sister's knees, and realized that Debby had shit right there, right in their sister's bedroom.
"Keep licking, Lin," Debby said with a cackle, winking at the girls, "maybe if you're in luck your sisters will need to shit too, and then you can lick them clean as well."
As Linda resumed licking Debby's shithole, Debby just looked smilingly at the two girls. They still had that look of utter amazement on their two faces. And though they were terribly shocked by all this, Debby could sense they were also intrigued, even aroused by what they were witnessing.
"I'll bet you girls would love to have your sister lick you clean the way she's licking me clean. Not the way she did when you were little girls, but the way she likes to clean shitty asses now, with her tongue."
The girls blushed hearing these provocative words, as did Linda, still lapping away between Debby's cheeks.
"Uh-- well-- " Lisa stuttered, "me and Tammy were just about to head to the bathroom when we saw you two. We both have to pee and poop so bad, all the way from the airport we've been really needing to go. We were joking about who'd get to take a crap first."
"No need to go to the bathroom, you can stay and take your craps right here," Debby told them, pointing to the mound of her own shit on the floor, "and then I'm sure your sister would be only too happy to lick you clean the way she's licking me clean. So take off your clothes and stay awhile."
Awkwardly, but eagerly, Lisa and Tammy undressed, and now the two teen coeds stood there, stark naked, their bowels full, ready to empty them. Ready to shit for Debby and their sister.
"God, I need to shit
so bad!
" Tammy said, clutching her tummy.
Lisa looked at her younger sister and smiled.
"
Shit
, sis? I guess you're growing up, "you always used to say 'poop'"
"Poop, shit, crap, take a dump. That's what I gotta do. I really need to go"
"So do I, sis, I can't wait to crap the way sis's girlfriend just did. And pee too"
"Yeah, and maybe sis will wipe us clean just like she did her girlfriend," Tammy said as the two naked sisters giggled, squirming.
Linda couldn't believe what she was hearing and partly kept her face buried in Debby's ass so her sisters wouldn't notice how much she was blushing, and make fun of her.
"Well girls," Debby said, "I guess the question now is just
where