am intrigued by what "crime" means in this story
Probably Ayako is thinking about misusing her position , working in pharmacy (unlimited access to meds and drugs). She isn't aware what happened under influence of drugs, so she could not address anything else as a crime...Except putting child-Asuka into sleep, without any other intention (so, she thinks she neglected her child in these occasions).
Then she took her time to chill and relax by herself (every parent can't wait the moment when children are sleeping, finally), but she does not know what exactly her relaxation was under the drugs, obviously. And, she is working single mother who truly needs time for chilling from everything. And she has found her way to do it when her child is sleeping.
Manga as manga, is not dark, is very cute and sexy, but contains the elements about subconsciousness, like the "dark side of the moon", and how it reflects in reality, what is superinteresting and very deep observation of some possible behavior (like desires toward something or someone, including incest in this case and how circumstances in life can influence on personalities and behavior, even when actual persons are not aware about it ).
I'm very curious how author will resolve this "mess " about their dark past, wishing Ayako and Asuka happy awakening. They should do it with consent, this time (?) Maybe it will set them free? Let's see what author will do, I have very high expectations, this manga is precious
I would not judge Ayako, even if it's true that she unconsciously committed a sexual crime with minor Asuka (crime is totally unintentional, if crime exists in this case) . She raised her child properly, and gave her best as a single mother. Both of them are victims of unhappy circumstances. I love them both. Please author, however dark is their past, make them happy.
All of my wat.