From her New York Times obit, 10/27/2020:
Dr. Joyce Wallace, a Manhattan internist who treated prostitutes for AIDS, occasionally brought streetwalkers home with her when they had nowhere else to go.
Once, when her son, Ari Kahn, was about 12, Dr. Wallace, who had to get to the hospital to see her patients, left him at home with a prostitute who was H.I.V. positive and going through heroin withdrawal. It wasn’t clear who was to take care of whom. Ari ended up making pizza for them both. When Dr. Wallace returned, she took the prostitute to a drug-treatment center; the woman eventually overcame her addiction and got a job at a research foundation that Dr. Wallace had started.
“On one hand, it was grossly irresponsible,” Mr. Kahn said of the incident in an interview. On the other hand, he said, it was typical of his mother’s extraordinary capacity for empathy, and she helped a lot of people.