Thats weird of fast they killed her. I dont know if its me but i feel like there is those "silence" when characters dont talk that much and do things quietly ( like murdering the bomb girl without any drama or cliffhanger ).
Even the drawing. It make me feel like there is a "silence" or perhaps its just me ?
I still think Makima is trying to keep Denji from doing shit that would get him killed. Whether she sees him as a pet, comrade, or love interest, I can't say.