Kids' Club's tale

On our way to JJ's favorite restaurant, FreshWorks, after picking him up from kids' club, JJ suddenly said " Ms. A of Kids Club likes boys. She sleeps with Mr. B and Mr. C". OMG, where did that come from? . So, we asked who had told him that. Being the diplomat that he was, the response was " Nobody". We kept asking him but he kept giving the same response. Go figure!