Michael got back from school early and when she realised that her parents were not home, usually her mom was but today she was nowhere to be seen. Michael felt disappointed at the idea that she was going to have to take care of her own lunch and decided against it and climbed the stairs of their house when she heard a sound coming from Spock's room. Michael and Spock were not the closest of siblings, in fact, she remembered him to be distant on purpose even though he saved her life and covered for her often.

She walked slowly to Spock's bedroom door and knocked. It occurred to her that she had not seen her brother for a while but considering that they kept different learning schedules it was not uncommon. It was then that she heard a thud and she opened the door to find Spock sprawled on the floor, when she went to help him up she could feel that he was warm and running a fever. Michael looked at her brother concerned.

Spock tried to wriggle away from her but she wouldn't let him and he did not have the strength to fight her so he said: "You should not have come in here."

"What is going on with you? And where is Mother" she asked.

"Please just leave. You are making this harder." He replied.

"Not until you tell me what is going on." She said to him firmly.

"You should know. You learn about this in school. About male Vulcan anatomy and growth."

Michael searched her memory for her the information about anything that could cause him to appear so sick and the only that came to mind was concerning Pon Farr and the mating rituals and around this time, normal Vulcans would choose their betrothed.

"It is time for you to pick a mate, brother." She looked at him with concern.

"I will not pick a mate. My human side is causing the symptoms to be less severe than normal Vulcan males and therefore I only have to last until the end of tomorrow and then I don't have to worry about it for another 5 years." He explained to her.

"Okay well what can I do to help?" she asked him.

"Nothing-" "Spock, I am your sister." "Except you are not. Not related by blood. My body can sense that and it is taking all of me to not try and defile you right now."

She looked at her brother shocked and he looked away ashamed. When she got up to leave, he grabbed her hand and then forced himself to let go.

Michael thought about him all night struggling because of her presence, because of his indecisiveness with choosing a mate. The last time she felt her presence was going to hurt the family she ran away and almost got herself killed, luckily Spock saved her but this time all it would take was sex to ease his suffering. She couldn't do it. The situation would have been different had they been in love and wanted to be together but that was not the case and having sex with Spock would only complicate a relationship that has been somewhat drama-free.

Michael thought about Spock all day the next day at school and when she got home, she could not take the silence anymore and went to check on him. She opened the door to his room, knowing he would not have opened had she knocked and was surprised to find that he was not there. But then she heard the door his bathroom open and out he walked. He still looked like he had a fever and he was still more pale the usual but he seemed to be able to be upright.

As soon as Spock saw her, he made his way to her and grabbed her face to kiss her. She stopped the kiss and backed away from him. "I thought you were doing better." She said to him.

"I am but I know I want this. I want to feel better and I want to not have to worry about Pon Farr again."

"What do you mean?" she asked

"If I mate with you then by the time the next Pon Farr comes in 5 years we will both have graduated from the Vulcan Science Academy and we won't have to be around each other therefore I won't feel the effects of it because my mate won't be near. Also, it makes sure I won't ever have to be betrothed against my will."

"Spock this is lunacy." She had backed away from him so far that she now had her back against his wall, she was afraid to look him in the eyes because she remembered the look of lust that filled them when he saw her.

"No. It's completely logical. We are not related, nor will you feel obligated to be my betrothed. Do you not want to help me? You owe me that much."

The room went silent and then Michael said "Close the door"

Spock went to close the door before kissing her this time she kissed him back but she found it hard to get in the mood and Spock could tell so he gestured to put his hands on her head and then her mind got filled with his thoughts, passions and fantasies of him and her having sex all over the house.

Once Michael got used to the shock of the mental intrusion she began to feel the heat rise up in her body she then pushed Spock to his knees, dropped her skirt, and lifted her right leg to go over his shoulder.

Spock knowing what to do immediately got to work licking her slit before inserting his finger into it and as he went along he adapted to her moans eventually bringing her to orgasm and then he directed them towards her bed and he removed his clothing before kissing her and reaching for breasts, lifting her shirt, and bra with it, to get better access. Nibbling and sucking on her breasts garnered so much pleasure from her that she began to ache for his erection she felt on her thigh to make its way in her.

Almost like he could sense her wanting, he moved her leg aside as he entered her, a groan like she had never heard from escaped his mouth and then he began to drive into her, slowly at first, as he figured out the perfect angle, but once she began to moan in pleasure, he sped up and marvelled at how wonderfully beautiful she looked completely lost in the moment as her breasts went up in down in the movement and then she came and her face made him come undone as well.

"So not only did you lose your virginity to your adoptive brother but you also had unprotected sex with him?" Tilly asked looking at Michael completely enthralled in her story.

"Of course we used protection, I just didn't think that was relevant," Michael said.

"Yeah, I guess the whole you being his mate thing is a bit of a big chunk of the story."

"I can't share a room with him, Tilly, I just can't."

"Okay, I get it. Let me see if I can organise with someone else for a swap okay? Maybe Airiam?"

"Yeah, that's a good combination."

Michael slumped down onto her bed and then said: "Today has been the most unusual day and the Captain did not help either."

"Why? What happened with the Captain?" Tilly asked.