this note one on the table

you read it carefully it says "i'm ready to face you" written with colored cannons, you laugh at how cute this is while you prepare to fight you put a slice of cake (where?, nobody knows after all in this world people carry objects like gta or sillent hill protagonist or like frisk himself in the game too) and go down the stairs while the thread of her dress continues unpicking it

as she goes down she prepares for the fight with a poker face preparing your usual dialogue, when frisk arrives with a quite familiar outfit and at the same time not... dressed in her usual clothes adding to this a mask cloak gloves and boots (the cloak of the dress, the mask of the curtains, towel for the gloves and boots plus pieces of the curtains for decoration looks very cute) she abandons her poker face and you smile thinking "how cute looks my boy" obviously not thinking about the fact that her disguise is suspiciously made of your belongings.

Frisk silently shows a passive fighting spirit (it should be noted that the player has chosen the pacifist route) so you fight against him by launching your attacks without hurting him seriously, while Frisk tries to show that he will be fine on the surface being this super Frisk doing actions with heroic poses that cause some tenderness to his mother who loses interest in holding her longer.