About Eve, Adam, and Their Stillborn Twins
I believe Eve had always loved Adam, Cain, and Abel. She said her wish was to start all over again and live a peaceful life together with the man she loved and her beloved children.
However, her wish will never come true. That is why she completely lost her mind and came to believe that eternal sleep was the ultimate happiness. Because, as the lyrics of "Gift from the Princess who Brought Sleep" suggest, both unpleasant reality and unrequited feelings can be forgotten within a dream.
I think it was only natural that Mikulia Calgaround feared her past as a prostitute would be exposed. Eve had to remain a virgin in order to stay with Adam and to give birth to Cain and Abel. Perhaps that subconscious drove Mikulia mad.
Cain and Abel were children who died before they were born. The only thing Eve could do for them was to keep remembering that they had truly lived inside her womb, and to continue loving them forever. And Adam also loves Eve and deeply regrets what he did to her. Therefore, he wished to start over from the beginning, too. I understand that some people dislike Eve and Adam, but I feel sorry for them.