Given that the username SleepyMaid isn't really used anywhere else on the net.
I think SleepyMaid made a Reddit account.
Because this post (Friday, 19 April 2019 according to the timestamp):
https://www.reddit.com/r/relationship_advice/comments/bch7cd/my_20f_father_47m_has_been_isolating_lately_and/
Coincides roughly with the cessation of their art creation.
This leads me to believe that family stuff has stopped their posting of art.
Their Patreon account:
https://www.patreon.com/sleepymaid/creators
Now shows "Aoife Bright" as the name, and Amazon has two listings for that Author, both erotica from 2011.
https://www.amazon.ca/s?i=digital-text&rh=p_27%3AAoife+Bright&s=relevancerank&text=Aoife+Bright&ref=dp_byline_sr_ebooks_2
Also a defunct Twitter:
https://nitter.net/aoifebright
This page indicates they live in Wales:
https://elisa-rolle.livejournal.com/1268574.html
This indicates they are or were a PhD student:
https://aoifebright.dreamwidth.org/283.html
Given that they are or were a PhD student, and that many times people make pen names based upon misspellings of their real name.
The following person may or may not be SleepyMaid:
Aoife (another valid English word with a close spelling to Bright, but a rather inverse meaning) has a Linked In, was in a PhD program for geology, and every time I searched for ("Aoife Bright" wales) in Google and Bing, it showed her page as the top result for some reason.
Again, this isn't necessarily the same person, but that's where Google / Bing led me.
But, if they are the same person, then she's started a family, and we won't see her again, because kids are time consuming.