Taken By....Heroes?

Allison Jackson is the daughter of Neptune/Poseidon. She goes by Ally. She is Percy Jackson's sister. Ally was bullied by her classmates and surprisingly she best friend, Christian Brewer. (Name of someone who bullied me) Ally ran away from her school in St. Louis and ran away to Manhattan. She was chased by Greek monsters to a place called Long Island Sound. She was surreally hurt and was about to die until Percy came and saved her. She had long black hair, blue green eyes, and acted like Percy. She was later claimed and Percy remembered her. She was his sister he lost in a car crash. She was proclaimed to be dead. Ally went on many quests and was able to see her mom again and her next stepdad, Paul. Ally was happy living with her brother at Camp Half-Blood.

While Nick Fury had a different idea in mind. He wants to detain Perseus Jackson. He is considered a terrorist to him. He sends the Avengers after Percy while he and Ally were out in the city getting lunch for her birthday. Fury sends the Avengers after them. Will Percy go with them and leave Ally? What would happen if Percy said no?