Is the insertion of semen resulting from masturbation into the vagina of a non-mahram woman considered adultery? And is it obligatory to inform the family about a child resulting from this, or should the matter be concealed?

Committing forbidden acts such as looking and touching is considered zina (fornication/adultery) in the general sense, and it is a sin that does not necessitate a hadd punishment and is not considered a major obscenity. As for zina in the specific sense, which is the major obscenity, it only occurs through intentional penetration into the farj (private parts) outside of marriage, ownership, or a shubha (semblance of right). Pregnancy resulting from something other than intercourse (i.e., by introducing fluid into the farj) is not considered zina in the specific sense that would necessitate the hadd punishment. The majority of jurists hold that the hadd punishment is not to be imposed on a woman who becomes pregnant without a husband unless she confesses to zina. Concealing a sin is مطلوب (desirable/required) if possible, while considering the child's right to life.