Lyric discussion by sleepyfaerie 

Cover art for Not Mine lyrics by Amanda Palmer

The line that really signifies a literal abortion to me is "Keeping this a secret has been murder", She literally had to "murder" it to keep it a secret, and to get on with her life and it isn't hers because it doesn't exist anymore, or similar to the other comments, its more like an alien thing that was put there mysteriously so she doesn't really feel attatchment to it.

Also, the song just sounds so creepy and sepulchral that I think it is about a literal death.

My Interpretation

Please excuse my run-on sentence.