It was about women who started lactating because of a virus or chemical spill or something. They got these milking devices that could be worn under the clothing so they could keep doing what they normally did, but the milkers made them feel so good that the women stopped working and just luxuriated in the feelings. There was also a partial focus on the doctor dealing with that condition, who was actually monitoring how the milkers were changing the women. I don’t fully recall where I read the story so I’m looking for help from each of the communities where I read.