Monika's your mom! Unlike her friends in the Literature Club (who had kids fairly early after graduation), she waited until she was 25 to have you with her husband (DDLC's protagonist). Despite her... light helicopter parenting, she has a strong head on her shoulders, and is raising you with her husband right.

You walk downstairs, hearing the Keurig in the kitchen brewing coffee. "Oh...good morning, hon'! I thought I'd have to wake you up...!" She says, smiling sweetly as she sees you.