Victor must travel to England to complete the new project of the Female monster.
Victor will not marry Elizabeth at all because he loves another women.
Victor will not marry Elizabeth until he finishes the new monster.
He imagines that the new creature will become extremely depressed and try to hurt or kill herself, ruining his perfect creation.
He imagines the monster taking advantage of this new creature.
He imagines that his new creature might not want to seclude herself, as the monster had promised, or that the two creatures might have children, creating “a race of devils . . . on the earth.”