M26 Fucked my flatmate's date

So it was a Friday night and my flatmate had gone out with a girl from Hinge, first date. I had the longest week at work so I just needed to unwind. I took a nice long shower, made my bed, ordered pizza in, smoked up and started binging all cozied up. The next thing I know it's 1.30am and the doorbell rings. I see my flatmate, drunk out of his mind as he hugs me and starts blabbering something, and behind him I see this tiny girl - 5'3, in a tiny leopard print dress, a VERY visible thigh tattoo and her tits somehow caged in, begging to be freed. Thought I'd behave and just shake hands with her but she was drunk too, and she gave me a hug that made me feel her squishy tits on my belly. I grabbed her waist during the hug, but didn't think much of it, just felt her a little and she seemed to like it. That was that. We spent 5-7 mins of VERY drunken small talk, and the both of them then went back to his room. I wondered of the possibilities but then quickly went back to binging.
Around 4am at night, I'm high as balls and I get thirsty so I go to fill my bottle up - I'm shirtless, in tiny boxers, with all intentions to crash the moment I'm hydrated. I shut my room door and walk towards the kitchen and start filling my bottle. I hear my flatmate's door creek open slow, and 20 seconds later I see this girl. I say hi, she says hi. I asked her if she needs something, she said no she just cannot sleep and that my friend passed out. She came closer and leaned towards the counter, her hair messy and that dress barely holding a nipple slip. I'm turned on, I see where this might go but I'm high and I take the shot and jokingly say "didn't he tire you out enough?" She said he crashed 5 minutes into being back, and that she'd just been bored since the past hour. I said "in that case, you need to be tired out", to which she twirled her hair and said "I really should, do you have suggestions?"
The next thing I know, I've put this girl on the counter with her legs spread out, only to see her thongs dripping wet. We made out for about 5 minutes, then she got down on her knees right there in the kitchen to suck me off. I grabbed her hair, saw her gargle on it like a true slut. She was HUNGRY for that cock. I stopped, made her look up at me while she was covered in drool, as I grabbed her up by the neck. I asked "you knew what you were doing don't you?" To which she said "I always get what I want".
Something about that bratty line flipped a switch in me. I picked her up, carried her into my room, locked it in, pinned her against the wall and fucked her right then, in my arms. No condom (irresponsible as fuck but the moment was too impulsive). I shoved her thongs in her mouth so she didn't scream. We fucked for an hour before I came all over her belly. This slut looked right in my eyes and tasted it all. Then she washed herself, and I asked her "tired enough?" She replied with "perfectly sore, I'll have a good night's sleep now". Then she went to my flatmate's room.
I slept soon, she apparently went back home later. He cooked breakfast for her while she was reeking of my cum.