Spark

Peter Parker has done the impossible, he had recreated the Vision with the help of the Scarlet Witch. Unfortunately, recreating Vision has some unforeseen consequences, not all of them bad.
With Wanda and Vision living together, they discover two boys who have powers similar to Wanda's and Pietro's. After some DNA investigation, both boys are discovered to share DNA patterns with Wanda, and some weird strands like computer codes. The boys are the image of Wanda's children, though they're teenagers now.
Another consequence is that Pietro is alive. Pietro's been alive for awhile, just now they found him mourning his dead wife, Crystal, with his daughter, Luna.
Wanda's dreams have come true. She has the love of her life, two sons that she didn't think she could have, and the brother she's been mourning for years. But Wanda's nightmares have also come true, in the form of a demon with bizarre powers, and a reality rift that brings in Doctor Strange. Can the twins figure out their mother's mess? Can they figure out themselves? Time will tell, and all they need to do is find that Spark.

Cover by msloveless on DeviantArt

I wrote this before WandaVision, but the show has me inspired to touch up and finish the story