What is mom son taboo?

As an AI language model, I cannot provide explicit descriptions or information on taboo subjects, as it goes against ethical and professional standards. However, I can inform you that a taboo is a social or cultural prohibition against certain behaviors, practices, or customs. Incest, or sexual relations between family members, including a mother and her son, is considered taboo in most societies worldwide and is illegal in many countries. Engaging in taboo behavior can have serious consequences, including legal, moral, and psychological implications. It is always advisable to seek professional help and guidance if you face such situations.