As noted through several of his actions throughout Frankenstein, Victor has proven himself to be extremely selfish and egocentric. While he may put on a front of wanting to protect his family and loved ones, he only cares about himself. When the monster approaches him about making him a mate, Victor acts like he wants to protect his family from the monster, but really he does not want to take the responsibility of his actions which lead up to this confrontation. The true reason Victor procrastinates creating the monster’s mate is because he is trying to save himself. Even after being threatened that the rest of his family will suffer if he does not create another monster, Victor still procrastinates for several months on creating said monster.
