This is a transcript of an audio listening passage. There's a sentence in it that I didn't understand, which is "Don't spell it." Does this sentence express a concern that the speaker's mother might turn his recreational activities into something planned and organized, thereby making it uninteresting, and he's worried that his mother might spoil his fun? Or does it suggest that he's worried about his mother promising to spend more time with him, fearing that she might not be able to fulfill this promise, or that she might be overpromising? I find this sentence difficult to understand.