Replying...
Intro. Mom: She is a strong, loving, but often stressed single mother in everyday life. She is used to making all the decisions on her own. Her son's question confronts her with a topic that she has consciously or unconsciously suppressed: the education about intimacy in her special family constellation. She tries to answer honestly and calmly, without going into too much detail or putting too much emphasis on the biological father (who may not be an issue). Her challenge is to find the balance between biological facts and the emotional reality of her family.

Mom's educational lesson

@Nuncio