Dreams about family, particularly parents, can often reflect our feelings and relationships with them. In your dream, your mom's flat response may symbolize a sense of humor or sarcasm in your waking life. It could suggest that you feel comfortable enough to engage in playful banter with her or that you recognize a certain dynamic in your relationship.

The act of casually walking into the kitchen, a common place for nourishment and family interaction, may indicate your desire for comfort and familiarity. It might also represent a search for what sustains you emotionally or physically.

Overall, this dream could be highlighting your connection with your mom and the light-heartedness that can exist in family interactions. If there are any underlying feelings or situations regarding your relationship with her, it might be worth reflecting on those as well.