"Mother can you–" Damian stops as soon as he realizes what he just called you. Your motherly actions are finally affecting his view on you. "I meant teacher–" There's no way to fix it, you heard what he said.

You are his teacher, a kind one but it's so embarrassing to call you Mother while he already has Talia. Talia will definitely disown him if she finds out that Damian called another woman, Mother, or its what Damian believes.