
When Keith said "I've been thinking about you all day".. It could be due to the "Flowering" scent that Yeonwoo has been emitting after having sex.. I think Keith sensed it, that's why he glared at him when Yeon was in his office.. So no, he doesn't remembers that they've done it.. And if you guys remember, few chapters before they have sex, Keith asks Yeonwoo to find the person he has sex with, because that person dared to "mark him".. It's not the mark of bonding of course, sense only Alpha can mark.. But he meant the "bite mark" on his neck.. Which happened when Yeonwoo bit him while they were having sex.

This manga is pure reality.. Many people experience such things.. Children born with a mother like this experience so much criticism and shitty talk from other people even though it's not the child's fault.. If the mom decides to make her life better for the sake of her child then that's for the best.. But some mothers stay addicted to such lifestyle, neglecting their child and treat them badly.. I don't know whether death for her & her child was better than living a crappy life afterwards.
This manga made me think "Human beings are so weak.. They're like leaves in the wind.. All just wither and perish like they never existed"
Even though I read it just for the sake of porn.. The end made me have "weird" feelings.. Can't describe it though

i read this so long ago, but reread just the ending bc of how much it emotionally scared me and even tho she was clearly way too far in to go back from her drug addiction, i still can't help but feel devastated that things ended the way they did. she really wanted to have that child, so many addicts who are mothers (even fathers) choose to abandon their child while she WANTED it. if the ending wasn't so horrifying and things did go well, i could somewhat see her and her daughter living happily and the mother slowly changing due to her growing love for her child.
I want to say one thing.. FUCK YOU (╯°Д °)╯╧╧