"Addison, are you coming with us?" Sara asked as the Waverider finished its journey to medieval England after a failed trip to the future.

Addison shook her head, "I'm gonna stay behind with Martin and see if we figure out another way to win this."

Sara nodded, she needed Addison on the front lines but she also saw how much this mission was tearing her apart even though she wasn't really sure why. The team left the ship and Addison was left sitting in the lab with Martin.

"I think you would feel better if you did get out there and do some fighting. I normally don't condone most of the violence we're apart of but you may need it to work through your thoughts," Martin stated as he began fiddling with something.

"What is that?" she asked, ignoring his suggestion and quickly changing the subject.

Martin shook his head as he shoved the small tech item into his drawer, "It's nothing and you are ignoring me. Don't you think working out your aggression might help?"

Addison laughed as she let his obvious theft from their last landing slide and shook her head, "I don't enjoy fighting just because I'm good at it. What always helps me feel better is a good….well, I don't want to make you blush but there's no way to get that so," she paused watching the Professor's cheeks redden, "I'll continue to be frustrated. Can I help you figure out how to use that little tool you stole?" she asked, deciding to turn the tables back on him.

Martin shook his head, "I don't know enough about it yet but you'll be the first to know. Maybe you should go take a nap."

"Do I make you nervous, Professor?" Addison asked, leaning forward baring just a little bit of cleavage, "I won't bite."

"What has gotten into you?" he asked, suddenly feeling alarmed.

Addison caught fear in his eyes as she shook off what she was saying, "I'm so sorry. I will leave you to your work. I really am very sorry," she said as she quickly left the lab and went straight to her room leaving Martin very confused.

Once Addison was in her room, she looked at the calendar and realized that it had been 8 months since they'd left and she knew that the undesirable part of her mutation was making its appearance. She knew she just needed to stay away from men for the next three days so she wouldn't do anything she might regret, well regret more, she thought to herself.

As she sat on her bed, her body heat boiling as she tried to think of anything but what was on her mind, there was a knock on her door.

"Please go away," she yelled to whoever might be trying to see her.

"Addison, it's Martin," she heard the Professor's voice, "I just wanted to check on you. You were acting strangely this morning. May I come in?" he asked.

Addison shook her head as she replied, "No, I'm good. Just please don't come through those doors."

She took a deep breath and hoped he would listen but she saw the doors sliding open and Martin walk in, his face suddenly filled with concern.

"You're covered in sweat," he commented, "Are you ill?"

Addison laughed as she tried not to look at him, "In a way but you really need to leave. Please."

"You know I can't just leave you like this," he replied, "You look like you're running a dangerously high fever. Come to the medbay and let Gideon treat you."

"Gideon can't do anything for me," she answered, "My super strength mutation came with some not so fun side effects and I just need to get through this one."

"I'm sure we can help you just tell me what's going on," he began, "I knew something wasn't right when you said all of those things earlier."

"I'm in heat," she replied simply.

"Fascinating," Martin said, curious now.

"Martin, you need to go. I only have so much control over myself right now," she warned as she felt her whole body aching for what it wanted.

"I can't leave you alone like this," Martin replied nervously, "Perhaps Gideon could suppress some of the hormones coursing through you," he suggested.

Addison stood from her bed and walked toward him, slow and deliberately, "Nothing can help me except for giving in. Once it happens, I am perfectly ok," she replied as she continued making her way to him.

Martin swallowed hard as he watched her, "Oh my," he began, "Addison, you just need to resist it. Remember that I am a happily married man with a daughter now," he protested.

Addison reached him and pushed him gently against the wall, running her hands underneath his sweater, beginning to undo the buttons underneath and running her hands of his bare chest, "Don't pretend like you don't want it too," she said, leaning forward to place her lips to his. She wasn't herself at all in this moment. She heard him groan in her ear as she made each movement.

Martin couldn't pretend like he hadn't developed any feelings for her while they'd been on this journey and he looked at it like scientific research and he was helping her, he justified it to himself as he ran his hands over her body, lifting her tank top over her head as she ran her hands down to his belt, undoing it slowly as she dropped down to her knees.

"Let's make sure you're ready to play," she whispered as she heard his breathing change to a more labored sound as she began to work on him.

After they finished, Martin excused himself from her room as he straightened his glasses and walked back to the lab where Jax was waiting.

"Gray," Jax said, "I just got some weird vibes from you. Everything ok?"

"I'm fine, Jefferson," he answered, feeling some of the guilt from what he'd just done.

Jax looked at him thinking over all the different emotions he'd gotten from the Professor over the last hour or so and he inhaled in surprise, "Gray, tell me you didn't?"

"Didn't what?" Martin replied, feigning surprise.

"Did you just sleep with Addison?" Jax asked, his voice filled with surprise.

Martin got defensive, "I was merely helping her out in a time of crisis and now she is able to work again. Stop thinking that way," he said, feeling the judgemental thoughts from from Jax.

"Claire is going to kill you," Jax replied as he walked away leaving Martin alone with his sudden guilt mixed with a sense of want he'd never experienced.

Addison, herself again now that the heat was gone, felt terrible for what she'd done and as she walked out of her room to see Martin and apologize, she saw Sara and the team walking in with Rip.

"Is he himself?" she asked, suddenly forgetting about everything else.

Sara shook her head, "No, but at least we have him now. He'll be in the brig if you want to see him."

"She smells of sex," Rip stated as she walked past her, "I suppose you've gotten over the nice me that is gone forever. That's good because I may be into you now. Join me," he offered as Ray smacked the back of his head.

"Shut up, Evil Rip," he said as Sara directed them to lock him up and she walked over to Addison.

"Did you hook up with Jax?" Sara asked, knowing Rip was right about what he said and she should know since she was normally the one starting things with inappropriate people.

Addison shook her head, her guilt eating her up.

"Oh my god," Sara replied, "You slept with Martin?"

"I didn't mean to," Addison replied, "You guys don't know everything about me and one of those things is that every 8 months I go into heat because my super strength comes from a mutation that is much like that of a black panther."

"You didn't think we should know something like that? Like, you might jump someone's bones?" Sara replied.

"I don't really think about it until it hits but I'm fine now, thanks to Professor Stein. I'm sorry," she replied as she walked away to see Rip.

Addison walked into the brig and saw him sitting there, his eyes looking like they were plotting, "Does being here help you remember anything?"

"You mistake me as someone who has amnesia and is acting based on new emotions of those who restored some of me to myself but that's not the case at all. I know everything but I'm choosing to join the winning team this time," he replied.

"So, you remember our kiss and what we'd decided but you don't care at all?" she asked, attempting to hide the hurt.

"I asked you to join me, beautiful," he replied as he stood and moved toward her reaching up to touch the glass, "But, it also looks as if you might have moved on, or was I incorrect earlier?"

"I didn't move on," Addison replied, "It was simply a means to an end."

"So, you used someone?" he said, his lips curling into a small evil smile.

"No, I care about that person very much," she replied, realizing just how messed up everything had become.

"That's a pity," Rip said as he walked back to sit down, "When you straighten up that little head of yours, come see me."

Addison shook her head as she walked away and straight back to her room, hoping to hide for the rest of this mission or all of eternity, if possible.

A/N: Things are getting messy on the Waverider.