Why might it have been adaptive for women to be more upset over their partner's emotional infidelity than his sexual infidelity?

Question

Quizplus · Accepted Answer

Emotional infidelity could indicate that the partner is emotionally investing time and energy in someone else, which may lead to a loss of resources (such as attention, affection and protection) for the woman and her offspring. On the other hand, sexual infidelity may not necessarily result in a loss of resources if the man is still providing for his primary partner and their offspring. Therefore, it may have been adaptive for women to be more upset over their partner's emotional infidelity.

Why Might It Have Been Adaptive for Women to Be