After the war Sally treats Nico like a son so he calles her mom. Nico and Will talk about meeting each other's parents but one day when they were talking about it Nico said " do you want to meet my mom ." Will was like um ok thinking some how Nico convinced his dad to meet his actual mom so when Nico took him to Percy's apt he was confused and when Nico shouted mom and Sally came out he was confused but at the end Sally was happy they were together cause Nico smiled a lot more and she was glad that her other son had love just like her older one

A/N: so I just write this head canon cause I wanted to have posted something for today I have many head canons on this type of situation. Probably some grammar mistakes and spelling and stuff . I enjoyed writing. I hope you enjoy reading it. Enjoy!!!