I don't know the comic story so I might be messing with the lore but:I think Laurel should just tell Lance already about Sarah.
You can't keep lying.![]()
It's a perfect time to do it. "Sarah" is back. Just have her disappear, tell Lance she died, change the color of her wig, and have new canary meet Lance with a different voice then Sarah or Laurel. Pretty simple lie to fix. Makes Chest Hair want to go after Brick even worse.