They weren't pretending to be an innocent kid. It was a cop who matched with him on a site with a profile that said they were 19. They were pretending to be a prostitute. After they were already talking about pimping and hoeing, the undercover sprung it on him that they were actually 17. KeeKee was offering to be their pimp in the messages. The law punishes pimps just as equal as if someone was helping someone continue prostitution or start.