Lyric discussion by Mero 

Cover art for Harsh the Herald Angels Sing lyrics by Casiotone for the Painfully Alone

I thought it was about an unexpected pregnancy, but not from the perspective of a couple, but rather a single female who 1) suffers morning sickness, 2) has to give up smoking and drinking 'for the baby', 3) doesn't quite know who the father is, Alan, William or James, 4) worries about what the neighbours will think shen they see her obviously pregnant and not wearing a wedding ring, and 5) hasn't thought of a name if the baby is a boy, but will call it Clare if it's a girl.

As far as casiotone writing songs from the perspective of a woman, there's plenty of others of his songs as well.