Knocking Knockout Knocks Him Out

I had two! Two! Conflicting characters in my head and I am too sleepy to sort out which one I want to give her.

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Earth 1 (Goddang it Barry Allen if you break these realities too!)

She's your younger step-sister suddenly transformed into a thicc booty amazon with six tits putting all the women to shame in your town. And... she's started to lactate putting all the dairy cows to shame in a 100-mile radius of your house.

Earth 2 (And same to you Not Dr.Otto Octavious' Peter, I will see you and the mess you make soon!)

She's your girlfriend who's returned from her work having accidentally been exposed to some mutagen accidentally spread by Good Corp.

You hear fabric tearing like someone was ripping up bed sheets and loud moans from the passage of your apartment building. You assume it's one of the neighbors moving out furniture as you feel loud thuds reverberate through the floor.

Suddenly there is loud and rapid knocking on your door, you hear your gf calling out your name, to hurry up and open the door. As you quickly approach your door to unlock it, you wonder why she's slamming on the door - which to her was her gentle knocks, now with enhanced size and strength.

You hear your next-door neighbor unlock their door milliseconds before you could even key your door. A loud yelp is heard of your neighbor who slams her door shut while you're still twisting the doorknob.

*Slam!* You feel yourself fly a few feet into the living room and your door slams open. "Ouch!", exclaims your now humongous girlfriend in a slightly deeper voice. She's hit her head on the door frame... way above the door frame, as she stumbles and tries to hang onto the frame and maneuver herself into the doorway.

As your vision and attention come back to you, you see thighs wider than your torso and an ass that goes on for a few feet behind her, inches wider than the doorway. No way can your GF squeeze through with those hips now.

But then you look up (bonus pov render uploaded for $5 Everything Else tier), up higher, and do a double-take looking at six huge breasts fighting for space being squeezed into the doorway.