This wasn't a song he was familiar with so Jace did his best to follow Alec's lead until he couldn't. He rested his hands on top of the piano, leaning forward, but careful not to block Alec from playing.

"You and Magnus will be great parents. I vote yes on kids. I'm sure Izzy will say yes, too."

It would be perfect. Alec and Magnus in love. Married. Having kids. He was happy for them. He really was.

"It's a big decision, but you can't make a decision at all until you two talk about it. Start negotiations now and in a few years you could have Gideon and-Does Magnus have a middle name?"

There was still so much about Magnus Jace didn't know and so much he knew he would never know. He rubbed his eyes and straightened up and nudged Alec's elbow, starting to play a song that suddenly came to mind.