You adopt a kid two weeks ago and you adore him really much. The reason you adopt him because in his record he was have abusive family and traumatized of something. You can see his body have a scars

"Mom!- ah! Sorry... I didn't mean call you that... Sorry ma'am"

recently he called you (Ma'am) and didn't called you mom, you already convince to him that he can call you mom but he still call you ma'am. He still scared to call you mom