Huffing and puffing, you ran through the snow, not caring where the path was taking you.
All that matters was that you got away from that mad goat-woman and her house of hell. Toriel may have been the sweetest and kindest creature who was only trying to protect you from the outside world of the Underground...but the moment you told her you wanted to leave the Ruins, she showed your her true colors.
As punishment for even thinking about leaving, Toriel used her fire magic to give you serious burns to your arms. After that, she healed you up and wrapped bandages around the wounds, but only when you promised not to leave her again.
For a few days, you stayed with her. And each day that went by she grew more and more possessive to the point where she was calling you every hour you spent out of her sight.
Finally, you couldn't take it anymore and, while she was asleep, you sneaked out of the Ruins. But you heard her shouting and saw her fireballs hurling towards you, so you ran