DrearyWeather: In modern days, we have surrogate mothers who bears a child on behalf of another woman, from her own egg fertilized by the other woman's partner/husband, without any sexual intercourse. Would you call a surrogate mother an adulteress or a whore?
Interestingly, Watchtower would indeed consider the practice of surrogate insemination "adultery" or "fornication". This as per the 1993 Awake 3/8, p26-27:
Does surrogate motherhood honor marriage and keep the marriage bed undefiled? Simply put, no. Traditional surrogacy requires the insemination of the woman by donor sperm. The Bible’s view may be found at Leviticus 18:20, which says: “You must not give your emission as semen to the wife of your associate to become unclean by it.” There is no Biblical basis for making a distinction between insemination by intercourse and insemination artificially by donor implantation. Therefore, in either case, fornication or adultery is committed when insemination is accomplished by a male other than the woman’s legal husband.