Why did detective chinatown's online drama Ivy kill Wen Song?

Ivy found the smiling face of the organization under the poor adjustment of Maureen and Sasha, and also found that there were spies inside the police station. With their clues and wisdom, she quickly found Wen Song. Although Ivy can get rid of Maureen, Sasha's special status can't be easily lifted, otherwise it will cause more trouble. So in order to save herself and other members of the organization, Ivy had to give up Wen Song.

Extended data:

Role experience

Ivy is the mastermind behind the smiling face and a member of Q organization. She was Maureen's partner and used Maureen to complete the perfect crime. I once opened a flower shop. At the age of fourteen, she immigrated to Thailand with her mother, married four times, and all four husbands died abnormally.

The police believe that Ivy has something to do with the smiling face organization that is widely rumored in Thailand. This organization will find beautiful women to lure rich people to get married, and then find killers to kill rich people and treat them as accidental deaths, and use marriage to transfer all assets.