Decided to make another part of this, because what else can I do with my life? (I've also decided to add another original character named Tristan, who will be Magnus's half-brother)

Previously:

I smiled and turned to leave before stopping in my tracks.

"Magnus, if you don't mind me asking, where were you for five years?" I asked.

"Hell. I didn't have a choice, I made a deal with-" Magnus answered, stopping in mid-sentence.

I sighed and walked over to pull Magnus into a hug.

"Don't you dare leave us again, you hear me?" I whispered in his ear.

"Always," Magnus whispered back.

I pulled away and left the loft.

Now:

Alec's POV

"You went to Magnus?!" Zach screamed at me, making me wince.

"He had to know!" I screamed back.

"NO, he didn't! You should've talked to me before you've done this! Alec, what the hell is wrong with you?!"

"YOU'RE NOT IN CONTROL OF ME!" I yelled.

"I AM YOUR HUSBAND! YOU DO WHAT I TELL YOU!" Zach growled before doing the one thing I thought he would never do to me: hit me.

"Hey Alec-" Jace started, then froze. "Am I interrupting something?"

"No, Jace. What do you want?" I sighed, holding one hand on my bruised cheek.

"Actually, you are," Zach hissed.

"Should I take your son out or..?" Jace asked.

"Actually, that would be great.. can you take him to Magnus please?" I answered.

"Yeah, of course. So you told him everything, huh?"

"JACE, just go!" I screamed.

Jace was about to say something before walking away.

Meanwhile...

Magnus's POV

I sighed as I looked in my mirror.

"You look broken," a voice whispered in my ear. I rolled my eyes.

"Tristan," I spat.

"You know, we miss you in Edom. Return to us," Tristan spoke.

"Yeah, how about... no," I snapped.

"Is that how you always greet your half-brother, my son?" Asmodeus asked, appearing in the mirror.

"Why don't you leave me alone, father!" I screamed. A hallucination is not what I needed at the time.

"Do not talk to your father like that," Tristan snapped.

"He is not my father and never will be," I hissed.

"Magnus, don't you know you can't choose your own family. I am and will always be your father," Asmodeus snickered.

"LEAVE ME ALONE!" I screamed loud enough that I was able to make them disappear.

A knock on the door made me freeze.

"Magnus? It's Jace," Jace called. I sighed and lazily flicked my wrist to open the door.

"What do you want?" I asked.

"Max, will you come here please? It's okay, you don't need to be afraid," Jace whispered softly.

"I want to go home," Max, I assume, replied.

"It's not safe for you to go home right now. Your dad doesn't want you to see him and your step dad fight, okay?" Jace tried to explain.

"This is my... son?" I whispered. Jace nodded. "Hey Max, it's okay, I'll take care of you"

Max froze then ran to the kitchen.

"What's going on between Alexander and Zach?" I asked.

"Zach didn't like Alec telling you everything," Jace sighed before leaving.

Back at the Institute...

Alec's POV

I sighed as I stared at my phone, trying to decide whether to call Magnus or not. Before I knew it, my phone was ringing with Magnus's name on the screen so of course I decided to answer it.

"Magnus...?" I asked, weakly.

"Alexander, are you okay?" Magnus asked, concerned.

"I'm fine.." I lied.

"Alexander, you're still terrible at lying. What's wrong?" Magnus sighed.

"I-I.." I started. "I need a portal, now"

Silence. Then all of a sudden, I was standing in Magnus's master bedroom.

"Alexander! What happened?" Magnus exclaimed, coming to my side, pulled me in a hug, and began healing my injuries.

"Zach, he... I've never seen him that mad before," I cried in his arms.

"Dad? Are you okay?" Max asked, startling me.

"I'm fine, Max," I answered, smiling sadly.

"Hey Max, I have toys in the living room. Why don't you go play with them and we'll meet you out there shortly? I want to talk to your dad alone," Magnus explained.

"Okay," Max answered.

The door didn't close until Max was out of the room.

"You need to leave Zach, Alexander," Magnus simply stated.

"I can't," I protested.

"You can't or you won't? Alexander, he beat you!"

"Magnus, please"

"You're going to stay with someone who just abused you because he didn't like what you did?"

"Magnus..."

"You told me you were happy"

Silence.

"I am happy, Magnus!" I screamed.

"No. You were," Magnus hissed.

"What am I supposed to do? I can't just leave him, Magnus"

"Why the hell not?"

"It doesn't matter"

Magnus sighed.

"Zach isn't good for you," Magnus whispered.

"Max loves him!" I exclaimed.

"Please don't tell me that's the reason why you can't leave him. Because that's stupid"

"Of course not!"

"Then what's the reason?!"

"Because of you, Magnus! Leaving Zach means not having a partner, not having someone to love. I-"

Magnus hushed me by kissing me passionately on the lips.

"Alexander.... why do you think I went to the Institute for you? I love you and I'm Max's father, what makes you think I don't want to be in his life permanently?" Magnus asked.

"We can't be together.." I cried.

"Yes, we can. I want you, I need you"

"No, Magnus. We can't..."

I closed my eyes before walking out of Magnus's apartment, leaving my son with him. I never found out that Magnus cried himself to sleep that night.

At the Institute (2 days later)

Alec's POV

"You told him, correct?" Zach practically screamed in my ear.

"I did exactly what you told me to do..." I replied.

"Good boy. Next time you see him, kill him," Zach threatened. I couldn't leave my husband even if I wanted to, he threatened to kill my son if I didn't do exactly what he said.

"I don't-"

"Alexander. Kill him the next time you see him. Am I understood?"

"Understood, sir"

I sighed as Zach walked away before crying in my pillow. My phone beeped, startling me.

From: Magnus

Hey... we really need to talk about what happened that night. Meet me later??

To: Magnus

I can't

From: Magnus

Tomorrow?

To: Magnus

I can't see you again. Ever

From: Magnus

What? Why??

"Alexander," Zach singed as he entered my room. I tried to hide my phone as quickly as possible but Zach was quicker, picking it up to read my texts. "Meet him tonight. The faster you see him, the better"

"I can't," I protested.

"Meet him tonight, Alexander!" Zach growled, handing my phone back to me. I shakily sent a text.

To: Magnus

Just got word that I'm free tonight. What time?

From: Magnus

8?

"Make it 5," Zach grinned.

To: Magnus

What about 5?

From: Magnus

5 works

"You know what you need to do," Zach hissed.

"How do you want me to do it?" I whispered.

"Stab him and keep doing it even after he's dead"

Some time later because I'm too lazy to write dialogue

At Magnus's apartment

Alec's POV

I panted as I held the knife behind me before knowing that I will eventually have to use it.

"Alexander, you okay?" Magnus asked, bringing me back to reality.

"I'm fine, Magnus," I replied.

"I still can't believe you're with that monster"

"Magnus..."

"He's abusive, Alexander!"

I walked up to him, resting my hand gently on his cheek.

"What I have to do, I'm sorry," I whispered.

"I know," Magnus whispered. I looked away as I stabbed my ex to death.

I cried as I texted my husband, telling him everything was finished.

"Excellent," Zach answered out of nowhere, making me jump.

"You happy now?" I glared.

"Absolutely. I-"

"Zach Lightwood, you are under the arrest for the attempted murder of Magnus Bane and the abuse of Alexander Gideon Lightwood," Catarina Loss, the Clave's main warlock police.

"I didn't do anything!" Zach screamed.

"Liar!" Magnus yelled.

"How- Alec killed you!"

"Fake knife, fake blood," Alec shrugged.

1 day earlier....

Alec's POV

"You asked why I said what I said? Zach is threatening the life of my, our, son," I whispered.

"Alexander, you need to find a way to free yourself..." Magnus cried.

"He's going to tell me to kill you, you know"

"Then kill me"

"What?" I asked, confused and shocked.

"Kill me using a fake knife. I'm a warlock so I can use my magic to conjure fake blood. Contact Catarina and tell her everything," Magnus explained.

"You're a genius! You'll have to call her though, there's no way I'll get away with it"

Present time

Alec's POV

"I love you," I whispered to my new husband, kissing him gently.

"I love you too," Magnus smiled.