In the Business by Jole1038
One of the longer multipart story by Jole1038 on DeviantArt. It’s written from the perspective of a male main character and his girlfriend, working as a unbirth for hire service. They basically unbirth kids, whose parents don’t want them any more (pretty fucking disturbing, I know). Later on, a second girl comes into play, and the three of them continue providing their “excellent” service.