Comment by KolyaKornelius

Informants fathering children with their sources was also a thing in the DDR. Often the lines were blurred because informants were former activists that were turned by threats and blackmail. But I personally know a woman who had 2 children with a guy who turned out to be an informant that had been specifically set upon her and her group of friends. She found out only after 1989 when the files were opened.