Suicide is the only "ethical" and "moral" option
Worship of the demon Gaia is so profoundly anti-human that those who worship the earth "goddess" have no choice but to commit self-murder.
In ancient times, pagan cultures would burn their children to death to sacrifice them to the demon Molech. This demon worship infected God's chosen people, and even some kings of Judah (Ahaz and Manasseh) worshiped this demon and burned their own children to death. This tradition continues to a less extreme extent today, with one mother who worships the demon Gaia allegedly allowing head lice to torment her daughter rather than offend the earth "goddess."
Of course, anyone can write anything to an advice columnist, and this particular story may be fabricated. The account is plausible, though, and fits with the deranged theology of Gaia-worship that flows through much of modern environmentalism.
The only option to truly fulfill the obligations of Gaia worship is suicide. This woman's immune system is "murdering" bacteria and viruses all the time. Many insects are "murdered" in growing and harvesting the plants she consumes for food. If she really believed in what she preaches - if she was not a heretic to her own religion - she would kill herself. That is the only way to truly know you are not "murdering" innocent beings in rebellion against the commands of Gaia - and your body can provide sustenance to insects that you are saving with your act of sacrifice!
Now, let me be clear: I am 100% opposed to suicide, for many reasons. I do not want anyone to kill himself or herself. Suicide is a terrible thing. What I am saying is a theology that refuses to even kill head lice is so completely anti-human that it would lead this mother to suicide if she actually was consistent in her religious beliefs.
The best option is to reject this evil theology and demon worship. The only true God tells us to have dominion over the earth in the book of Genesis - a creation ordinance that predates the Fall. Do not worship the demon Gaia. Instead, repent of your sins and accept Jesus Christ as your Lord and Savior. Jesus, who loves you so much that He gave His own life to redeem you from punishment for sins committed against Him, would never want you or your children to be tormented by parasites. He instead commands you to exterminate them. That is what having dominion means.