A/N 1: For all those reading please do continue. I do have plenty more planned, there is just a bit of re-watching of the current season to be done. So stay tuned. :)

A/N 2: we now know that Jace is 22/23 and that Alec is 24/25 as of the Season 2 ep 12 due to Imogen Herondale saying that Stephen died 23 years ago. That makes Agatha 25/26 due to being older than Alec. So the ages that I previously mentioned aren't entirely accurate.

2016

Agatha was laying in Alec's room in the Institute waiting for Alec to come back from his first date with her older brother. She wanted to know how the date went and whenever she asked Magnus how his dates went she never got anywhere with him. Agatha stayed laying on Alec's bed she didn't plan on moving any time soon. Alec arrived as Agatha was about to fall asleep, he roughly sat down on the bed and lay down beside her.

"Hey Alec," Agatha smiled at him, poking him in the stomach. "How did it go?"

"Aggie...I don't know...how is a first date supposed to go?" Alec answered, staring at her as they lay on his bed.

"Asking the wrong person here, remember the only person I've dated...was our failed one the one you discovered who you were," Agatha told him letting out a small laugh as she looked at him and saw the look on his face. "Wait...did Magnus tell you how many?"

"He said seventeen...thousand," Alec was quiet, so was Agatha the last time Magnus had told her how many dates he had been on wasn't that many. "You don't seem surprised,"

"I'm not...Magnus is old remember," Agatha responded resting her head on his shoulder. "Aside from finding how many dates he has been on, how did it go?"

"I told him that I didn't care about how many he had been on and that I was willing to take it slowly if he was," Alec told her with a smile on his face which Agatha reciprocated.

"Told you that he was worth it," Agatha laughed, closing her eyes and putting her heads on Alec's pillow. "Just so you know I'm not leaving your room tonight,"

"I know," Alec stood up briefly to change into his pyjamas.

"Alexander I love you, but now I need sleep," Agatha told him, as he climbed back onto the bed and put his head back on the pillow beside him. "Never change,"

Agatha and Alec lay together before they fell asleep, Agatha had no plans for leaving Alec's room until breakfast the next morning. It had been a long time since they had both fallen asleep in the same room without either of their siblings being present. When they woke in the morning they saw Isabelle and Clary standing at the end of the bed, staring at them.

"Uh why are you two in bed together?" Clary questioned, looking at Isabelle as she spoke and then towards Alec and Agatha.

"Get your minds out of the gutter, Alec has been my best-friend since we were two and three years old," Agatha laughed poking the taller boy in the side as she sat up and looked at the two girls. "I wanted to talk to him,"

"Ooh that's right you had a date with Magnus," Isabelle sat straight on the bed next to Alec and looked at her big brother.

"Izzy, do you mind?" Alec questioned, neither Agatha or Alec had moved and were still laying in bed.

"Iz, I don't plan on getting up any time soon," Agatha stuck her tongue out at her young parabatai as Alec moved his legs to push her off the bed. "Why are you in here any way?"

"Just wanted to see if you wanted to go for coffee this morning? I could do with some Aggie time," Isabelle smiled at her and then stood up not wanting to land on the floor of Alec's room.

"Maybe later Izzy," Agatha smiled at her parabatai but didn't move from where she and Alec were lying in his head. "I love you Iz but I want sleep,"

"Isabelle, come back later," Alec yawned as Agatha moved her hands and pushed Isabelle and Clary out the door. "Was that necessary?" Alec glanced at Agatha who simply smiled at him.

"What? We haven't spent time like this since, what was it? Your sixteenth or eighteenth?" Agatha yawned closing her eyes again. "Can we just stay here, and ignore all the Shadowhunter business for today?"

"Something like that," Alec replied, as they laid in bed not wanting to get up. "We have to get up eventually,"

"I know, but bed is good," Agatha laughed before they both fell asleep again.

Agatha and Alec lay in bed asleep for as long as the could before they were yet again interrupted by Isabelle and Clary knocking on the door. Agatha growled something incoherent and waved her hand opening the door much like Magnus had a tendency to do.

"Were they ever a thing?" Clary could be heard asking as her and Isabelle stood in the doorway.

"Them? A thing? No," Isabelle was almost certain that Agatha and Alec had never been together.

"Are you sure? You weren't surprised that they were in bed together," Clary laughed she felt like the two older Shadowhunters had a history that Isabelle wasn't quite aware of.

"Of course I'm sure," Isabelle answered looking at Clary as she spoke. "Why do you say otherwise?"

"They just seem very comfortable with each other, I don't know how to explain it," Clary told her as they came face to face with Agatha and Alec still laying in bed.

"We're getting up...we just didn't sleep," Agatha smirked at Isabelle and Clary before she burst out laughing at the look that the two of them were giving her and Alec.

"Relax, Izzy you know how long Aggie and I have known each other for," Alec rolled his eyes at Isabelle and Clary as the two of them got out of bed.

"I've know Alec since I was three and he was two, and that was a damn long time ago," Agatha was still laughing as she got out of Alec's bed and walked over to Isabelle and Clary. "Did you actually want us for something?"

"Breakfast?" Isabelle questioned, even though it was lunch time.

"Izzy it's more like lunch now vamoose," Alec rolled his eyes at his sister and best-friend who had wrapped her arms around Isabelle.

Agatha, Clary and Isabelle walked from Alec's room and down the hallway to Agatha's room where she left them heading to the bathroom. Isabelle wanted to talk to Alec to see how his date with Magnus went but she also wanted time with Agatha – this left her feeling conflicted. Meanwhile Alec had flopped back on his bed and was staring at the ceiling wondering if he really had gone on a date with Magnus Bane the night before or whether it was all just a dream.