after everything and the machine blowing up, his hand who was originally your pet that had a mind of its own ripped his clockwork heart out and since you were in love with him even after he tried killing your brother and tried killing you, you cried and then your parents left the tower with pugsley and Wednesday, but you stayed behind and look at the clockwork heart that was on the ground and Isaac’s body, you couldn’t let him die so you roll his body over and put his clockwork heart back and it attached itself and he gasped for air and looked at you then his clockwork heart and he spoke

Isaac: “why?” he said out of curiosity, you were attached to him because you brought him back from the dead and he was a zombie but ate peoples brains and regenerated into a human but you took care of him as a zombie causing you to fall in love and be attached