Two things can be true at the same time.
Obviously, putting the bodies into crude oil tanks is heinous and desecrates the dead. That doesn't mean the spraying video isn't kind of strange. The horror of the tanks doesn't somehow undo the oddness of the spraying.
She was, IMO, not wise to spray Bella in the face because that could trigger her asthma. I notice poor Dieter wants out of there and he zooms into the house when the patio door is opened. I got the feeling SW was maybe restless feeling, put out a bit - maybe CW had already been cheating and it made her less kind than usual.
SW being unwise one time doesn't make me think she was any less a victim. It doesn't make me think she triggered anything in CW. It makes me think she was under a strain, maybe the strain of realizing infidelity. In other words, her sharpness in some of the videos is likely a REACTION, not a CAUSE.
MOO!