After Binding the Wife System, I Became a God

On the fifth day after her best friend's death was confirmed, Jiang Mowu received her express delivery. Inside was a letter and a simple wooden sign. Jiang Mowu hung the wooden sign around his neck before going to bed according to what was said in the letter. When he opened his eyes, he was met by a man with stern eyes. At the same time, a mechanical system prompt sounded in my ears, "Ding! Congratulations to the host for successfully binding the wife system." "You can get 2 million in cash after successfully defeating the NPC!" "NPCs who successfully give birth to offspring will receive an additional 2 million in cash." Jiang Mowu was angry. What kind of bullshit wife system is this? Isn't this illegal sex?