>>723662983
Junko's difficult pregnancy is one of the reasons why she does not want to get married. The birthing monster represents Hinako's impressionable mind on this matter.

Another fact. Junko is wearing a Karasu Tengu mask. This is a less evolved form of the Tengu. They usually serve a Daitengu, her husband, and they cause mischief, including abducting people and returning them mad. Her marriage is like an abduction to her, and it goes without saying that it is driving her insane.