Sorry Doll

Logan goes back in time to save the future from the Sentinels. When he finds the professor a new secret is revealed. A mutant. One whose been hidden. Kept inside the school even after it shut down in 1973. Charles knew she wouldn't be able to survive out on her own so she kept her there. When a mysterious man visits one day she can't help but be curious when he says he's from the future. She wants to help. But whatever happened to her after?