I get what's happening here in this chapter. The sister stares at them, awaiting their sins, while they do something exploitative. What I don't get is, why do the gamers care? How did an NPC's stare warp their mentality to the point of either becoming masochistic or break down emotionally? I've done stupid shit in video games all the time and barely care that some other player is staring at me. So gamers practically give zero shits about NPCs, unless that NPC is important to a quest or future reward.
Now, I understand that he would have a different reaction. She's now real, so her stare is something more tangible. But when you have a goal- fuck 'em.