Why not?

This is a good thing. Right?

"Hey, Izzy" Simon said lovingly, as he cuddled his girlfriend closer and started rubbing relaxed patterns on her back.
"Yes, love" Izzy cooed, placing her hand on Simons face and rubbing his cheek gently with a callused thumb
"Will you marry me?" Isabelle froze.
________________________________

Simon still couldn't believe she said yes. It was a day before his engagement party and he was still panicking. What if people think we're too young? Or that we couldn't handle being married? What if this was a bad decision? This was the only thing Simon could think about. No he told himself this is a good thing. You love Isabelle otherwise you wouldn't have spontaneously proposed. His thoughts were interrupted by a knock at the door

"Simon!" Jocelyn called "Can I come in?"
Simon slid out of bed and tiredly opened the door. "Hi sweetheart!" Simon was greeted with Jocelyn's excited voice, "Oh, someone looks miserable." She pointed out, frowning

"Not miserable, tired" Simon replied, gesturing for her to come in and sit down.

"Oh, honey. You can't sleep?" Jocelyn asked worriedly. Wow, she really is like my second mother Simon thought. "Are you having doubts?"

"Not, really" Simon replied as Jocelyn closed the door behind her and sat down on the bed. She patted the space next to her, meaning she wanted Simon to sit down next to her. "I think I'm just scared. I just can't stop thinking about it. I thought that by now I would've accepted it and I would be able to sleep at night." Simon sat down next to Jocelyn and the bed dipped

"Simon, honey" Jocelyn said, placing her hand on Simon's shoulder and rubbing it in soothing circles, "Don't be scared, leave that for the wedding." She chuckled, "Sweetie, you only proposed to Isabelle yesterday. I don't know why you decided to have the engagement party two days after you proposed. But, that doesn't matter. You love Isabelle and that is all that matters in this moment. Your love is something to be cherished. Be excited to get married. This is your future, Simon. With the girl that you love the most." She paused, " I always tried to be just as much as a mother to you as I am to Clary and I am always here if you need me, Okay?" Simon nodded slowly, a grin spreading across his face

"Thanks, Jocelyn" Simon said in a voice filled with affection as he kissed her cheek

"Anytime, Simon" Jocelyn replied, beaming

"Simon! Izzy needs you downstairs!" A voice from behind the door called

"Coming, Maryse!" Simon called

"So Simon, you are going to marry her." Jocelyn said encouragingly. Simon took a deep breath.

"Why not?" He replied in a low voice

[A/N] I know that this short but this was only meant to be a bit of fluff. I love the mother/ son dynamic between Jocelyn and Simon. This is my first ever fic so I'm sorry if it isn't amazing