He was still puzzling over it when both of them heard Kirstie's key in the front door lock.
"Oh my God, it's her!" Marsha said. "You'd better go in the bathroom or something, so she won't find you in here!"
"Right."
In a flash Rick darted down the short hallway and into the bathroom, shutting the door behind him. While he was there, he made use of the time to wash Marsha's pussyjuice off his prick and his hands. What if Kirstie should take his tool into her mouth and taste something funny? Questions would come up. But then he realized again how complicated things were. Kirstie wouldn't be giving him head, not right away, not with Marsha there. And yet, how would they get rid of her without letting her guess that they wanted to do what brothers and sisters weren't supposed to do?
After a decent interval, he opened the bathroom door and went outside. Marsha, he noticed as he walked down the hallway, was still in her bedroom.
She winked at him and made a seductive suckmouth as he passed. Kirstie was in the livingroom. When he saw her, his cock started swelling and thumping wildly. God, she's more beautiful than I remembered! he thought.
Kirstie gave him an odd smile. Her eyes glimmered with tears that he supposed were the result of her emotion at seeing him again. "Hi," she said softly.
"Eli."
He went across the room and took her in his arms and kissed her. He crushed her fantastic body against his and stabbed his tongue into her warm mouth. His hands found her firm ass and he pulled her groin into his pulsing hard-on.
Kirstie kissed him back, but only briefly. Then she pulled away. "Don't do that!" she said in a hushed voice. "What if my roommate sees us?"
"What if she does?"
"Don't forget that you're my… brother." Kirstie had a hard time getting the word out. She seemed very troubled about something.
"How could I forget that?" Rick joked, trying to be casual.
The atmosphere between, them was very stiff and uncomfortable, nothing like Rick had expected it to be. Do you suppose she doesn't want me any more? he thought. Maybe she has a boyfriend, and she doesn't want to start it up again between us.
But his sexual feelings for Kirstie were incredibly strong. It was almost as if the past two hours with Marsha hadn't even happened. His throbbing hard-on refused to deflate. He didn't know what to do. He and Kirstie still stood apart, murmuring asinine welcomes to each other.
"Well. It sure is nice to see you," Kirstie said, nervously.
"Yeah. Nice to see you, too. I… missed you."
"I missed you too."
She wouldn't look him in the eye. Suddenly Marsha came into the room. Kirstie seemed to freeze visibly.
"Hi, Kirstie," Marsha said, sounding nervous herself.
"You two have already met," Kirstie said. "I… got into town a little early," Rick said. "I came right over."
He sensed the jealousy in his sister's voice. He knew how smart Kirstie was. It wouldn't take her long to put two and two together.
"I see," Kirstie said.
"He got here about a half an hour ago," Marsha said quickly.
"Oh?"
Rick chuckled nervously.
"Well," Kirstie said, still acting very aloof. "Shall we all have dinner here, or shall we all go out to a restaurant together? Just a cozy little threesome." Her voice shook with controlled spite.
"Oh, I've got a smashing idea," Marsha said, smiling brightly, feigning a total innocent that Rick thought was transparent. "Why don't I run down to the store and get some food. And I'll cook some dinner while you two just sit here and get reacquainted. How's that?"
Kirstie shrugged. "Whatever," she said indifferently.
"Sounds okay to me," Rick said.
"Great," Marsha said. "I'll be right back."
Before they knew it she had snatched up her purse and dashed out the door, leaving them alone. She had seemed very eager to escape.
Rick looked at his sister. Now that they were alone, she didn't seem aloof any more. Instead she was vulnerable again. Her eyes glistened with tears.
He went over and took her in his arms and kissed her amazingly sensual mouth. This time she kissed him back passionately, her body quivering and responding to his embrace. He stroked her firm ass and brought his hands up to her breasts, squeezing them through the thin cloth of her shirt.
"What's the matter, Sis?" he murmured against her cheek.
"Nothing."
Rick's fingers fumbled with the buttons of her shirt. "How far away is that store anyway?" he whispered.
"Three blocks."
"I wish it was three miles."
"Oh God, I've missed you so much!" she sighed. Rick got her shirt open and put his lips on her warm upstanding breasts. The blood pounded and throbbed in his prick. Kirstie's nipples were so large and swollen. He thought of all the titties he had had in his mouth. None of them could match his sister's. He sucked her big soft nipples hungrily.
"Oh God!" she gasped. "Fuck me, Rickie. Fuck me quick, before she gets back. God, I've waited so long for it!"
"I know, I know," he panted. "Me too."
Her body seemed to melt in his arms. He knew they didn't have time to get undressed and then dress again before Marsha returned. So he pulled her down on the floor and pushed her skirt up around her waist. She quickly skimmed off her panties. They both unbuckled and unzipped his pants, and Kirstie pulled them down his legs. Rick's huge cock jumped up twitching. She looked at it worshipfully.
"God, honey, put it in me slow," she gasped. "I want to feel every inch of it going in me."
"We've got to hurry," he told her.
"I know." She lay back, spreading her thighs, opening her arms to him. "Fuck me, Rickie honey, fuck me… it's been so long… so long… Ohhhh! Oh! Ohhhh!"
She moaned as he slowly slid the long shaft of his stiff prick into her wet slit. She clasped her legs around him and held his cock in her. Her feelings were so intense she thought she might faint.
"Don't move!" she panted. "Don't move, I want to feel it! Oh God, Rickie, I love you! God, it's been so long! Oh… oh yes… aaahhhnnnn!"
Slowly he inched it out of her again until her clinging cuntlips touched only the bulbous head of his cock. Kirstie's beautiful face was contorted with sexual rapture. As he plunged it into her again, she writhed and groaned, her head tossing on the carpet.
"Oh God… oh God, it's heaven!" she gasped.
Almost lost himself in the intense pleasure of it, Rick suddenly remembered that they had little time. He began fucking her slowly, then more rapidly. He remembered how quickly, she could come when she was really worked up. But he didn't know how quickly he would be able to come himself, having shot off three times with Marsha. Still, Kirstie's incredible sucking cunt was the tightest he had ever felt. It pinched and squeezed his thrusting prick, driving him wild with pleasure.
"Yes… yes! Unh!" Kirstie panted, gyrating her hips. "Oh baby… oh baby!"
The hot storm of passion engulfed them both.
Kirstie's legs clung tightly to his pumping hips. She whimpered and moaned. Her eyes rolled up behind her lids. Again and again Rick plunged his huge cock to the very bottom of her clasping pussy, making her wince and yelp with animalistic pleasure.
"Oh! Aiiee uuh! Ohhhnnnnn baby… aijee!"
She was a wild thrashing woman in his arms. Incredibly, Rick lunged into her and felt the hot strings of cum shooting out of his cock. Her clenching cunt seemed to yank the jism right out of his throbbing balls. Kirstie felt him coming. It was the fuse that set off her explosion.
"Aahhnn!" she cried out sharply. "aahhnn! Oh! Oh God! Aauunnggiieeee! Oh Rickieeeee! Aauunngghhieeeee!"
Their bodies were locked together as the convulsive spasms tore through them. Kirstie pumped her groin up off the floor into his driving prick and coughed violently as a new orgasm wrenched her.