As usual, Stephanie awoke at the first sound of the alarm clock and hit the snooze button. She swung her long legs off the bed and sat there momentarily before heading, naked, for the bathroom. She and Roger, her stepfather, preferred to sleep nude, and neither one saw any need to wear a bathrobe in the bedroom they shared. They had been sleeping together ever since the night of her eighteenth birthday, when he gave her the ultimatum of sex with him or be kicked out of the house into the streets. That night and every day and night since, Stephanie had been thankful she chose to stay. She was already a sensuous young woman, and Roger had shown her how great sex could be with a partner who was knowledgeable and considerate.
Before flushing the toilet, she noticed the blotches of blood in the water. "Damn, it looks like my period is on time again," she told herself. She was disappointed because it was Friday and Stephanie had been hoping she would be late by a few days. On Friday nights, she and Roger always liked to enjoy some very strenuous sex, getting the weekend off to a rousing start. It wasn't that menstruation was ever painful or even uncomfortable to her, just inconvenient, especially this time when it was starting on Friday, and would spoil their fun for the whole weekend.
"I guess we'll just have to settle for a blow job tonight." This would not exactly be a hardship for either of them. She really liked sucking cocks; even with her previous boy friends, it was her favorite thing to do. Now that she was sharing Roger's bed, she especially liked to suck him off and swallow the cum he pumped into her mouth, almost as much as he liked having her do it.
Stephanie returned to the bed, raised the top sheet and noted the streaks of blood where she had been lying. She raised it a little more and smiled at the sight of Roger, still asleep and facing where she had just been. She smiled again when she saw his cock, big and hard and beautiful, and thought of the great times they had shared already, and the even greater times they would be sharing in the future, hopefully starting that night.
They wanted to avoid any controversy. Even though they were not related by blood and she was 18 years old, some busybodies would have considered their relationship to be sinful and incestuous, so Stephanie had her own bedroom where she kept her clothing and personal things. After her pleasantly erotic thoughts about Roger's cock, she went there to finish washing, comb her long, blonde hair and get dressed for school, including inserting a tampon.
When Roger came downstairs to join her in the kitchen, she kissed his cheek in a daughterly way. "Good morning, Daddy. I've got some bad news. She had always called him "Daddy"; he was the only father she had ever known. In the bedroom, this form of address had the sexual connotation but in other parts of the house or in public, it was just what an affectionate daughter would call her male parent.
"Good morning, Steph." He kissed the cheek she presented to him. "This is Friday. How can you possibly have bad news on Friday?"
She looked around before answering. She knew there was nobody to overhear the very personal news she had for him, but there was no such thing as being too careful. "I started my period today, Daddy."
"Okay. That means you're not preggers."
"It means that and it also means we can't have the fun evening we like to have on Friday."
"Don't worry, Steph. We'll think of something to do."
Stephanie's day in school was uneventful. There were classes to go to, where she answered some questions and avoided others. She studied, chatted with friends and brushed off boys who wanted to date her that weekend. For at least the last two years, she had a deserved reputation for enjoying sex and not being too fussy about her partner. The former was still true but the latter had not been correct since she and Roger had started sleeping together. With a man to take care of her sexual needs, she had no interest in boys.
Roger's day at work wasn't very exciting either, but it was less normal. What he did out of the ordinary was to buy a tube of Aqualube and some lubricated condoms. On their first night together, when Stephanie had given in and agreed to be his sex partner, she had briefly tried to delay the start of their sex life by standing with her back to him while undressing for their mutual shower. Roger had admired her succulent, creamy ass, and later, when his fingers strayed to her rosebud, they had both enjoyed the contact. That night, and many times since, he had fucked her ass with his finger while eating her pussy. He had also resolved that he would eventually fuck her ass and, after learning her menses had started running, he had decided that Friday night would be the time.
Stephanie arrived home from school and started preparing the dinner that she and Roger would be sharing. When Roger arrived, they embraced in the hallway, away from any windows. This had become their preferred place to greet each other in the evening because they could freely express how much they enjoyed their rather unconventional relationship with no fear of nosy friends or neighbors. As their tongues mingled between their open mouths, Roger ran his hands all over Stephanie's womanly ass and hips, thinking about the new pleasures that awaited them later.
After dinner, they relaxed together in front of the television set and talked about their respective days. At nine o'clock, as was their custom, they rose from the sofa and headed upstairs to the master bedroom and bath. They didn't shower together every day but they always did on Fridays, making that the starting point for their highly enjoyable weekend sex. Stephanie didn't know exactly what would happen that evening but she expected to suck Roger off in the shower and again after they had gotten into bed. He had never suggested anything other than that before while she was menstruating and she hoped he never would. Much as she enjoyed fucking with Roger, and having him eat her pussy, she considered such activities to be gross in the extreme at that time of the month.
As usual, they started their shower together with Roger washing her back and shoulders and working his way down to her voluptuous hips and ass. When he reached there, he paid more attention than usual. Using the same mild soap Stephanie uses on her face, Roger started carefully washing the cleft of her ass. Very gently, using the pads of his fingertips, he ministered to that very sensitive place. She smiled at his attentions, and arched her back slightly to get the most from the pleasant sensation, especially when his fingers were rubbing across her rosebud.
"Oh!" she expressed her delighted surprise when one of those fingers slipped inside her. Roger didn't usually do that in the shower. Her surprise immediately gave way to pleasure and she bent forward and arched her back more, letting the invading finger slide in so far that she could feel Roger's knuckles pressed up against her cleft.
"Oh, Daddy! That feels good. Funny but good."
"Just an experiment, Honey. I'm glad you like it." Roger fucked his finger in and out of his stepdaughter a few more times, gratified at her murmurs of pleasure and the way her ass squirmed involuntarily, much as her pussy did while he was eating her out. She was really enjoying the presence of his finger and wanted to get the most out of it, and Roger believed she would enjoy what he had in mind as much as he did. He removed his finger from her and finished washing her legs, as he usually did when they showered together.
Although she had enjoyed it, Stephanie was a bit worried. Roger always fucked her ass with his finger while he was eating her pussy but that would not be possible that evening. She remembered that one of her friends had told her how she had allowed her boy friend to fuck her ass while she was in her period, and how painful it had been. Even when she told him how much it was hurting her, and begged him to stop, he didn't, and she was sore for a week afterward. The friend had even bled a little and considered herself lucky that she didn't get an infection, because she had been too embarrassed to seek any medical treatment. Stephanie had gotten a lot of pleasure from Roger's finger going in and out of her ass, but his cock was much bigger and might be very painful.