From Brad's position in the bed, he noticed that through the angles of the mirrors in the hotel room, he had a great vantage point to see a reflection of what was going on in the bathroom. Heather, thinking she had enough privacy as it was, didn't bother to close the bathroom door and was completely unaware that she was getting naked in front of her brother. Brad tried to look away, but she removed her bra and he was unable to do anything else but look. Her A-cup breasts were perky and her nipples were erect. She pulled off her panties, revealing a dark bush. Brad's cock stiffened. He wanted to look away. He wanted his erection to go down. He knew that he shouldn't look at his sister that way. He forced himself to turn on his side, away from the mirrors and concealing his hard on.
Heather emerged from the bathroom with her nipples poking through the fabric of her nightie. She walked across the room with her dirty clothes and bent over to put them in a laundry bag. She was once again in Brad's line of vision, and he lay there looking at her ass and watching how the nightie rode up to expose some of her thighs. His hard on throbbed. Heather got into bed. They said goodnight to each other and she shut off the light.
Brad was having a sexy dream and his penis felt good. When he opened his eyes, it was morning and he was spooning his sister. His stiff cock was sticking out through the fly of his boxers and was pressed between Heather's ass cheeks. Her nightie was bunched up around her stomach and his arm was draped over her with his hand underneath the nightie and fondling one of her breasts. Her nipples were erect. She was grinding her ass against his cock and he was grinding himself back against her.
He knew he should stop, he thought, but he was too turned on. Besides, she was grinding herself against him. He tried not to think that she was his sister. He just focused instead on the nearly naked girl pressed against him, grinding her ass against his cock and letting him feel up her perky tit. He decided it was best to keep at it, all the while pretending to still be asleep, so in case she did wake up, he could claim to be innocent.
But Heather already woke up. She too had been having a sexy dream and her pussy was wet when she woke up to feel the all too real sensations. She was confused at first, and then briefly horrified when she realized it was her brother who was making her feel this way. She thought about stopping, but she was too horny. Besides, he was the one groping her. She couldn't see his face anyway, so she decided to pretend to be still asleep so she could continue letting him touch her this way.
They continued grinding against each other, enjoying the sensation of his naked cock against her naked ass, his hand massaging her bare breast and nipple. She slowly moved her hand down to stealthily rub her clit. Heather's pussy was dripping wet by now and she began to grind harder against Brad. She spread her legs a little bit and his dick went in closer, rubbing itself between her inner thighs and grazing her outer pussy lips,
With his cock closer to her vagina, Heather closed her legs a little, tightening herself around her brother's cock. She was grinding hard and he was thrusting back. Brad felt his cock tighten and he could feel the tip of his cock brushing against his sister's pussy lips. He squeezed her breast.
He wanted to cum so badly and no longer cared about the reasons why he shouldn't. He felt it building up inside of him and then he thought about how Heather looked when he saw her naked in the mirror last night. Cum shot out of him and he kept squirting again and again in sweet release.
She had been fingering herself the whole time and felt her own body tensing up. She felt his warm semen spurting against her thighs and pussy. She felt the way his cock pulsed as he came. It pushed her over the edge and she started to come as well, squeezing her thighs tight and convulsing her body as waves of pleasure overtook her.
When her body stopped, both of their orgasms were over and they were each overcome with the seriousness of what just happened. She parted her legs and he slipped his cock out. He tucked it back into his boxers and rolled over to his other side, facing away from her. She remained perfectly still, looking toward the window and feeling ashamed for taking advantage of her brother that way. Brad stared at the wall, terrified for the moment when his sister wakes up and finds his cum all over her.
As Brad tried to think of ways he could sneakily clean his cum off of his sister before she awoke, Heather continued to lay there, naked from the waist down and feeling his sperm drip and run in all directions down her thighs. The heck with it, she thought, and then quickly got out of bed. She pulled her nightie down and quickly walked to the bathroom. Brad closed his eyes to pretend to be still asleep, but partly opened one eye so he could watch her movement. His heart pounded. She shut the bathroom door.
She removed her nightie and stood totally naked in front of the mirror. She could see streaks of cum drying on her. Her pussy started to get wet again. Ashamed, she wiped herself clean with a wet washcloth, but the wiping motion just made her wetter. She turned on the shower. She thought about rubbing one out again in the shower, but quickly pushed that thought of her head and turned the faucet until the water ran ice cold.
Brad could hear the water running. He knew he needed to apologize but didn't know how. He tried to rehearse different apologies in his head, but couldn't decide on the best way to go about doing it. The water shut off. His heart quickened. Heather dried off, wrapped the towel around her, and emerged from the bathroom. She saw Brad sitting up in bed. There was no way he could fake being asleep to avoid the inevitable conversation.