Andy woke with his usual morning hard on. He lay there stroking it, thinking about yesterday's events. He could hardly believe his luck. He'd had a crush on Kim for as long as he could remember, but she'd always seemed uninterested. Turns out she was more than a little interested. He pulled his cock through the hole in his shorts, feeling the elastic grab around the base like another hand. Stroking it, he didn't consider the sun, shining right through his screen, silhouetting his profile on the curtain beside his bed. He lay there thinking about Kim's ass. He hadn't had a chance to really explore her yet, and he was so looking forward to that. Kim and Sue had been quietly talking facing each other. They'd pulled the curtain aside a bit so they could see when Andy woke up. Sue was leaning on her elbow, facing Andy's side when Kim saw her mouth drop open.
"What? What do you see?" Kim asked, starting to roll over.
"Shhhh" Sue whispered in her ear before giving it a quick lick.
Kim looked over and watched the profile, feeling her nipples harden. She was now lying on her back, and Sue leaned down and took a crinkly nipple in her teeth. Kim hissed and held Sue's head to her, but she couldn't look away from the curtain.
Sue watched her brother stroke his cock. She knew he did it, of course, but she'd never actually caught him in action. She could feel her pussy responding to the image. Kim put her hand down and rested it on Sue's thigh. Sue reached over then and softly probed Kim's mound. They both stopped for a minute and took their panties off. For an added thrill they opened the curtain all the way. If anyone came in the door, they'd be able to see what the girls where doing, but the girls couldn't hear anyone moving outside. If Andy moved his curtain, he'd see for sure. They resumed their positions, and both started stroking each other's pelt. They could see Andy's hips reaching skyward, fucking the air as he rapidly approached orgasm. Sue leaned over and started whispering in Kim's ear.
"Oooo, look at that cock. It looks so hard and yummy. I bet you'd like to be over there sucking it right now, wouldn't you? I bet you'd like to have your head on the ground and your ass in the air. Feeling him slide in and out. It looks so good. Was it good baby? Did my brother's cock feel good inside your tight cunt."
Kim moaned, her body visibly jerking with the staccato cadence of Sue's words. She turned to Sue, "God yes. He felt great fucking me. I can't wait to feel him inside me again." She wildly kissed Sue.
"Was he big enough?" Sue asked, while they where both looking at his cock profile silhouetted the thin curtain.
"God yes! He felt fucking huge!" Sue's fingers were working their magic, her thumb lightly stroking Kim's clit.
"Was he thick enough?" Sue added another finger into Kim's pussy.
"Mm hmmm. He felt so good. I wondered why I never did it sooner, but I'm glad I waited for him. I love his cock, I want his cock. I need his cock."
Kim started to get up, but Sue held her down. "Sshhh, wait and watch."
Kim was whining, "But I want it. It feels so good. You should feel it." Kim's fingers started working on Sue's clit. She couldn't reach more than that and her dewy lips.
Sue had seen her brother naked several times, but she'd never thought of him sexually, but looking at the shadow of his cock now, as he was stroking it, made her pussy spasm.
Kim noticed her tremors and hissed, "Ooo, does that make you hot? Do you want to fuck your brother too? Maybe we could fuck him together." Their fingers were getting more frantic on each other, their hips thrusting.
Andy was at the brink. Thinking of exploring Kim more sent him over the edge. The girls heard him grunt and saw his hips thrust. They couldn't see his cum but they almost felt it.
Kim was thrashing and moaning, "Oh!Oh! Ooohhhhh fuuuck!" her fingers also a blur on Sue's pussy. As she was coming down they saw Andy's hand stir the come on his abdomen. Kim said, "Imagine Susie, him shooting that load in you, feeling his cum in you, running out of your tasty pussy." That did it for Sue, she squealed as she came and the girls watched in horror as Andy whipped the curtain back, but Sue couldn't stop. Her brother's eyes locked on her made it worse (better?) until she slumped down, spent. Andy closed the curtain and got dressed, trying to think for a minute while the girls recovered, but too shocked to think.
When the girls opened their curtain 20 minutes later Andy was sitting on the edge of his bed watching them. They'd pulled their tops and underwear back on but they still felt naked under his eyes as they climbed out and sat on their bed. They looked at each other, unsure how to proceed, when Andy got up and came over to them. Kneeling down, he put his arms around them both and hugged them tight. "Whatever happens, remember. I love you both."
The girls where a little hesitant, but they succumbed to the warmth that awaited them. Kim's soul was filled with love for this man that she'd barely known before yesterday. Sue's soul was filled with love for this man that she'd known all her life.
Andy continued, "We'll just take each day as it comes. For now, we should get up before Dad and Alyssa do."
They got themselves under control, then they all trooped out of the trailer. Sue was the last one out looking back into the trailer as she alighted. She ran into the back of Kim who had stopped for some reason. Sitting there in two lawn chairs where John and Alyssa. Andy continued on as if nothing happened. Kim had no choice but to follow him to the picnic table, lest she stand there like a dummy. Sue trailed along behind.
John said, "Well? Anybody care to enlighten me as to what the fuck was going on in there?"
"Uh, Dad." Sue started. John cut her off with a gesture, looking at Andy.
Andy said, a little nervous now, "Sorry Dad, we didn't realize anyone was awake."
Kim was looking down as John continued, "Your sister was in the trailer with you!"
"I checked before we started, Dad. She was asleep with her mp3 buds in. I didn't think she'd hear us."
"It's OK, Dad." Sue furnished. "I didn't hear much. I just caught the end of it and it didn't shock me. It's not like I'm totally innocent."
"Like I needed to hear that." John muttered. Louder he said, "We could hear it pretty good out here, too."
Kim was aghast; she buried her face in Andy's shirt. Andy responded by putting his arm around her protectively.