What is the maximum relationship degree defined in the Punishment of Incest Act 1908 for illegal sexual conduct?

The correct response identifies that the maximum relationship degree considered in the Punishment of Incest Act 1908 pertains to immediate family members. This legislation explicitly prohibits sexual relations between individuals who are closely related, including parents, children, and siblings. These relationships fall under the scope of "immediate family," which is central to the Act’s intent to safeguard the integrity of familial bonds and prevent the adverse social and genetic consequences that can arise from incestuous conduct.

Understanding this context is crucial, as the law is strictly aimed at protecting immediate family structures and avoiding situations that might lead to abuse or exploitation. The other relationships, such as those of first cousins or second cousins, do not fall within the limitations set by the Act, as it is primarily concerned with the closest biological connections. Thus, the choice specifying "immediate family members" accurately reflects the legal definition established by the Act regarding illegal sexual conduct.