Looking for some feedback on a dark thriller thing I'm writing!

((I'm really only writing this story for myself, not trying to get it published or make money or anything. Really, I just want to know if my writing style is at all good, and whether or not it's even readable to others lol. Any feedback is appreciated :) Kind of debating posting it somewhere like AO3 when I've written more.

Long term, the story is kind of a romance between male and female serial killers (edgy, I know lol), but I'm trying to really build up the characters a lot separately before they even meet. The girl's first kill is the man who >!raped!< her friend, which she justified to herself as a righteous act. (This leads into a slippery slope of becoming addicted to the feeling of "righteous" killing, but that's later)

This is a snippet from the second chapter of the girl's perspective, after calling said friend to come over and help move the body.))

.........

Almost an hour later, there was a knock at the door, then the doorknob shook as Lauren tried to barge in without waiting for an answer. 

“Heyyy gurl, your door is locked!”

Molly sighed in exasperation as she went to unlock the door, unable to help the smile creeping onto her lips. ‘This girl, I swear…’ 

Upon opening the door, a whoosh of blonde descended on Molly, making her take a step back from the force of the hug. 

“Moolllyyyyy, it’s been too long~”

“Lauren, I saw you two days ago.”

Breaking away from the hug to hold her friend by the shoulders at arms length, the petite girl had a look of faux seriousness on her face. “Exactly, I didn’t get to see you for two whole days!” Another quick hug and she bounced into the house, going straight to the kitchen. “Oooo can I have a cup of coffee?”

In the ten seconds it took Molly to lock the door and get to the kitchen, Lauren had somehow already poured herself a cup and was sipping away.

“Excellent taste, as always my deahh~” she sang playfully. “So, whatcha got goin on? Where’re the bodies to bury?? I forgot a shovel so I hope you have a spare!”

Lauren giggled to herself, her broad smile not quite reaching her eyes. Ever since she’d been raped last year, her demeanor had gone from just fun and optimistic to this almost frantic constant state of upbeat bubbliness. Having known her for as long as she had, Molly knew she was putting up a front, but never felt like it was the time to pry. She’d never been good at opening up, let alone getting other people to do it. 

“So… About that… It’s not really multiple bodies, it’s just the one.”

Lauren’s smile faltered a bit as a look of slight worry crept in. “Just the one…? Love, what’s wrong? You know you can talk to me about anything!”

Molly fidgeted with her coffee mug, unsure how to proceed. “Well... remember last year, when you met that guy Jeremy and, um… y’know, when that happened to you?”

A darkness spread across her friend’s eyes as her smile dampened and became even more obviously forced. “I really try not to think about it, Molly. Why are you bringing this up now?”

Molly looks away, staring into her cup.

“Well, I may have run into him last night.”

Lauren suddenly stiffened, her smile disappearing entirely. She sidled up to Molly, putting an arm around her shoulder with a look of panic. “What did he do to you?! Are you okay?!?”

“Yeah, yeah, I’m okay. Actually, I don’t know if I’ve ever been better. The thing is, I got him drunk, brought him back here, and um… whew…” Molly took a deep breath and exhaled slowly as her friend looked on, bewildered.

“What the fuck? You brought him here?!? Molly, what aren’t you telling me? What happened?”

“Well… he never left.”

Lauren seemed beyond confused at this point, until Molly pointed over her shoulder at where the full body bag laid motionless in the dining room. Confusion turned to shock as it dawned on Lauren what Molly meant. She backed up, gripping her coffee tightly to stop her hands from shaking too much.

“W-wait. Are you saying… Is that… Did you…?”

Molly looked Lauren directly in the eyes for the first time since she arrived.

“I killed him.”

Crash

Like a cliche, Lauren’s coffee cup fell from her hands, shattering all over the floor. Molly didn’t flinch, just holding eye contact with her friend. 

“You k-killed… so that’s… He’s… W-what?”

Cold as ice, the newly minted killer continued. “I killed him, Lauren. I murdered him. For a few months now, I’ve been following him, learning his habits, trying to figure out who, if anyone, would notice him missing. I made a plan to get him drunk, bring him back here, and slit his throat. Which is exactly what I did. Last night. Right there in the dining room. He can’t hurt you or anyone else ever again.” 

Shakily, the blonde turned to look at the bag again, leaning against the counter for support. “S-so… when you said on the phone that you needed help hiding a… b-body… you meant it literally?”

“Mhm.” With a nod, Molly set down her own coffee and crouched to calmly pick up the pieces of broken mug scattered across the kitchen floor. “I thought that I’d planned it out well enough, but I honestly can’t lift him by myself, even if he was a five foot four manlet. After deliberating for a while, I realized that the only person I could turn to was you. Plus, I thought you might want to see it for yourself, even being the ‘innocent’ angel that you are.”

She looked up at her friend with a small, hesitant smile, knowing full well that her friend was anything but innocent. Molly and Lauren had been quite the party animals in their early twenties, although those days were long behind them.

The stunned look of horror on Lauren’s face seemed to relax the tiniest bit. Dark humor was always the best way to break through to her. She stood quietly, just watching Molly clean up the mess she’d made.

After putting the pieces in a plastic grocery bag and wiping up the coffee with some of the leftover paper towels from the night before, Molly turned to the still silent girl and softly said, “You want to see it for yourself…?”

Lauren just stared back at Molly, unable to speak or act.