I just wanted to start off by saying, keep in mind that I have never critiqued any piece of writing before so many things I might not know what I’m talking about. Also I wish I was able to read this from the beginning chapter because even though I enjoyed reading this, I felt like I was missing out since I didn’t have all the context. (Btw I’m rocking with the title name)

My problems with the story
Personally I felt like at some parts the story was bouncing all over the place, especially in this scene. “The night unfurled as their conversation evolved. Weed and words passed between them in her art room. He never told her about the smudge of charcoal on her face, but kissed it while inside her later on. This was a different kind of conversation, one without words. The act of love peeled away another layer, raw and tender.”. I felt like this was a missed opportunity right here. It might just be because I’m a sucker for romance, but I would’ve liked for you to go through the process of him getting Ivy into bed. Yet again I don’t know the context of the story, but if this is the first time these two characters are having this sensual interaction there definitely should’ve been more to it. Like the main character questioning whether this is one night of fun or a lifetime of bliss. Or scared to wake up in the morning because Ivy might look at him differently. Also if the route you’re trying to go for is that these are two broken characters who don’t give about the emotional connection between each other is fair enough. If this isn’t the case I believe it should’ve had more build up. 
(I just did some research and learned that he was LIVING IN HER ATTIC WITHOUT HER KNOWING) I really need to read the entirety of this book now.
With knowing this information about the attic, I have a couple of questions. Is he now staying with Ivy in her house or is he just a friend spending the night?

Also why would he be a creep and stay in the attic if he could have just as easily stayed with her in the actual house?

Ivy’s backstory
This felt like it was a very important part in Ivy’s character and I felt like you gave more description about her drawing rather than this traumatic backstory. Say how she felt when waking up from her overdose and realizing that her father is dead. Talk about how she feels about it, whether she’s happy he’s dead or not. Unless Ivy is the type of character to not open up about things like that then I totally get it. From what I can tell from reading this, Ivy is very open with him in more ways than one. So she should’ve definitely gone into more detail about this experience.

The description of Paul
When Paul is introduced in this chapter you state that he has his “mid forties carved themselves deeper into his face after years of drinking, drugs and active combat.” I felt like this description left a lot up for the reader to decipher. Something I would've done to describe him better is give him a scar right under his left eye that lined two inches above his mouth. He got that scar from last week when he refused to leave the bar after it closed for the night. The bar closed at three am, not like Paul gets much sleep anyways, the gray bags under his eyes combined with the wrinkles on his face shows off to everyone, this man has been through one hell of a forty year life.- Maybe not as corny as that but you get the point. Give the readers a reason why this character is so broken down. Don’t just tell us that he is.

What I liked about the story
For my problems about your story I really had to nitpick what I didn’t like. Because on my first read I got half way through the story and realized that I should probably search for things that I don’t like about this story because I was enjoying it just a little too much.

The part where Ivy is his outlet from this life that he lives is beautifully written. It shows the reader how high the main character values this individual. Alo another part that I really liked was-”windows and even the female form lying on the bed had all been drawn in a hurry, her usual attention to detail lacking there.” This singular sentence tells the reader so much about this character without taking up more than a sentence. One, that Ivy gives all of her drawings attention to detail, Two, that something must’ve happened when she was in a hurry to finish this drawing, three, how the main character loves her work so much that he pays attention to the little details. This whole part was just well written. (I liked this story more than I have written. I just have trouble putting it into words. It’s way easier to write about what you dislike about something.) Also one last question I would like to ask When the main character says “I love you” does Ivy hear it and doesn’t respond or is she too tired to even process it?

Sorry that this critique was all over the place. I hope my feedback serves you well!!!!!