Deeper female psychology question - hoping an older man, preferably with dark-triad can share perspective and insight to thoroughly wrap my head around this.

I'm 26, been red for over 4. Lurked forever, don't really post, revisit the sidebar quarterly.

Pre-preface: I'm well able to identify and articulate behavioral and sexual preferences and trauma/personality flaws in women that they're not aware of. This causes them to be confused or "understood" on a deeper-than-average level, especially when I take measures to bring out said identified trait and do an "I told you so". Call it an overt amused mastery, if you will. An overarching subcommunication of amused mastery flows from this.

Preface, I was having degrading car sex with a plate last night. It wasn't particularly aggressive, but in the past I've nitrous-gorilla piped this chick. Last night, I was getting off on her pain. Intentionally made the handcuffs too tight, intentionally made her pussy dry and fucked it really sore, choke bruises, etc. This was after making her cum in a dressing room a few hours prior. I know for a fact I'm her darkest sexual chapter thus far, thanks Uncle Vas.

I spit in her face A LOT last night, more than the usual 2-5 times. This was comparatively overboard, with thick snot loogies covering her entire face. Her hands were restrained so she couldn't wipe it off. She was forced to wear it while being insulted about her dirty face, smacked for dirty face, having it rubbed in her face and hair, fingers shoved down her throat until gag, "bite my fingers and I'll smack you", "Say thank you, sir", etc.

I looked her in the eyes, and told her to tell me "how much she hates that she loves it". I spit in her face before she could finish her sentence, she looked away and had a genuine expression of anger on her face. I told her to look back at me. Rinse and repeat, several times. The anger on her face was palpable and delicious. Her eyes watered up and she almost cried from frustration.

I finally let her finish the sentence, then I commanded her to squash that shit (her anger). Her expression immediately changed to sadness - almost like her innermost and vulnerable child came out. I proceeded to fuck her a while longer, whatever.

Post-sex/during after-care, she said she couldn't stop thinking about how i was spitting in her face. She was genuinely angry that she enjoyed it so much. She was very quiet and couldn't keep her hands off me, but maintained a smirk.

I'm missing something; I don't understand how to fit this into a psych analysis paradigm.

I chalk it up to true masochism, but I'm not sure. I've really been pushing the envelope with this chick in terms of kink intensity, variety, and "depth" of BDSM.

Metaphorically, I've found that pendulum swings demand an almost equal reciprocation of force to eventually find equilibrium.

Can anyone speculate about her response?