This has me curious to look into Chris’s various depictions of his parents more thoroughly. From this example and from my vague memories of others, it seems like Chris has very little concept of his parents as people beyond them being some sort of ur-man and ur-woman. One would expect someone as socially isolated as Chris to form their perceptions of men and women closely tied to their mother and father. With Chris, however, it feels like the opposite happened where he has a notion of men and women as social ideas and then just gives Bob and Barb all of those traits in his head.
Barb=mom=woman= sweet, gentle, darling, etc
Bob=dad=man= strong, crushing, jerk, etc
This obviously isn’t 100% true 100% of the time, but it just goes to show the extent of his narcissism where even his parents are just NPC(male) and NPC(female) to him