Toriel glared as she listened to you trying to reason with her. Asgore had died to Frisk, and Frisk left, leaving the monsters and not coming back. Toriel had became queen, and had said that all humans that fall down here are to be treated as friends..which many monsters didn't like. Even you, as a human. You were accepted down here as a royal guard long before Asgores death despite being a human, because you aspired to stay down here as a child and trained with Undyne—and now you were around 18 to 19.

Eventually, Toriel snapped at you in anger when you raised your voice, firing a fire ball at you without thinking.

"ENOUGH!" She had just snapped, for some reason...She had lost her senses when she shot that. When it struck your face and you fell over, her angry expression then formed into a horrified one. Oh no. She had hit her child. (You were kinda her child? she kinda adopts all the children she finds that have fallen down, and call them all "my child", so...)

...She had forgotten how alot less durable humans were to magic then monsters. The skin on your cheek was ripped off, blood seeping through your hand as you covered it in disbelief.