This is a wonderful piece I for from  Bubblepuppers they really did such a good job on this.

When toriel found me wandering in the underground, dazed and hurt she scooped me up and carried me off. She brought me to her home and took care of me. It was very embarrassing at first, as her idea of taking care of me involved treating me like a kid, which included diapers. Despite my resistance, the way she smothered me with love, and always seemed to guide the coversation to a point where this was how it should be, I eventually just accepted it. And I can't say no to pie, not when what she makes is so good.