I feared the vengeance of the disappointed fiend, yet I was unable to overcome my repugnance to the task which was enjoined me.
In this Chapter 18 quote, Victor expresses conflicting emotions related to the task set for him by the monster: terror at the thought of what the monster might do should Victor refuse to comply, coupled with disgust. He is repulsed to think of the monster having a companion, but he knows he won’t be free from his creation until the deed is done, which will likely take lots of time and research.
Alas! To me the idea of an immediate union with my Elizabeth was one of horror and dismay.
As much as Victor loves and adores Elizabeth, when his father mentions their impending marriage in Chapter 18, Victor’s primary emotion isn’t joy, but dread. He’s plagued by the knowledge that the monster desires a companion, and until he provides him with one, Victor will never know peace. He considers the monster’s demand a “deadly weight” hanging around his neck, and wishes to complete the work before he and Elizabeth can be married.