According to the search results, it is confirmed that the characters 簡單 (Jiandan) and 高健 (Gaojian) in the TV drama "小爸媽" (Xiao Baba Ma) did get divorced. In episode 25, it is mentioned that 簡單與莫凡鬧離婚 (Jiandan and Mofan had a divorce dispute). The reason for their divorce is not explicitly stated in the provided search results.