Another way is to join Criminal Minds fanfiction groups on Facebook or other social media platforms. Ask the members if they know of any fanfictions where Morgan calls Reid 'baby boy'. They might be able to point you to some great stories or even share their own unpublished works that have this theme.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). Just type in 'Morgan calls Reid baby boy' in the search bar, and it should show relevant stories. Fanfiction.net is another option, but AO3 usually has a wider range of stories with better tagging systems.
Try using Tumblr as well. There are often fanfiction writers who post snippets or links to their stories on Tumblr. Search for tags like 'Criminal Minds fanfiction', 'Morgan Reid', and 'Morgan calls Reid baby boy'. You might also find fan communities dedicated to Criminal Minds fanfiction where people can recommend stories with this specific element.
Chapter 313, "Grandpa, You Scared My Guest", is the clearest early answer because it turns Miss Jiang's situation into a concrete plot event. A useful checkpoint is the way the scene starts with When he was brought in, Zhou Wenshu was still in a fog.
Chapter 262, "Flash Change Quartet Speaks Out for Jiang Li", is the clearest early answer because it turns Sister Chen's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Wen Jiaojiao couldn't stand it anymore and immediately logged onto...
Chapter 233, "Individual, Ten, Hundred, Thousand... Million, Ten Million, Damn!!!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with [What the hell, what's this about life span ending??
Chapter 345, "Mirror Valley Defense Commander Luo Ming, Beast Tide, Great Xia's 6 Armies (Part 2)", is the clearest early answer because it turns Great Xia's situation into a concrete plot event. The chapter gives readers a real answer by opening on Last June, Luo Ming led his team in Arrow Bamboo Forest to... and ending on Upon assuming the role, he learned about the concept of Creation....
Chapter 150, "Has She Been Cursed?!", is the clearest early answer because it turns Children Palace's situation into a concrete plot event. The chapter turns that into something concrete by moving from Upon hearing the first part of Jiang Li's words, Zhang Cheng...
Chapter 155, "There Are Actually Two Flying Guests?!", is the clearest early answer because it turns Shining Transformation Trip's situation into a concrete plot event.
Chapter 335, "Songyang Ridge, Seven Houses Surrender, First Batch of Silver Arrives", is the clearest early answer because it pushes Xu Ning into a new phase or setting. The chapter gives readers a real answer by opening on The name "Songyang Ridge" was not given by Xu Ning; he discovered... and ending on Ji Yang from Wanlong, representing the Six Families of Songyang....
Chapter 302, "Did You Just Stomp on the Answer Sheet Twice Before Handing It In?", is the clearest early answer because it turns Jing University's situation into a concrete plot event. Early on, He deliberately cleared his throat and said, "I didn't score very....
Chapter 189, "Do You Still Like the Gifts from the Program Team?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. It opens with Seeing his painstakingly planted roses trashed like this, even as a...
Chapter 323, "Approaching Labor, the Talented Xiao Family Assembles Urgently", is the clearest early answer because it turns Xia Li's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Second Year of Great Xia, December 15 Not long after nightfall, Inner... and follows through with Hen'er told me that even his uncle personally named him, my little....