You where doing the laundry, while the boys are in the living room.
Cuphead watches tv while mugchild was thinking, you didn't know was that cuphead had this power that shoots a intense beam of power ((or whatever the fuck)) from his finger tips.

Mugs had always thought if he can do the same but was afraid to try. He rolls up the long sleeves from his big sweater and looked at his hands, he can at least try. Mugs made a gun with his fingers ((U know what I mean right?)) Like his brother does when he uses his power thing.

Cuphead looked over at mugchild and his eyes widen "mugs don't! Not in the house!" He yelled, mugchild looked at his older brother confused. His hand is still a finger gun "why not?" He asked "you'll break something and (m/d) will get mad" cuphead said "oh..." mugs frowned. "B-but I want to try it... ! So I can be like you!" Mugchild said, accidentally putting his thumb down and a beam of blue light shoots out of his fingertip and shot a vase breaking it to pieces.

"Uh oh.." they both said as Mugs sleeves covered up his hands again. You ran in the living room in a big hurry thinking one of your boys got hurt "what happened!?" You yelled.
You looked at the boys who where sitting on the couch unharmed and a broken vase on the floor.

Mugchilds eyes water "i-im sorry  (m/d) i-i broke the vase... p-plz don't be mad at me" he said covering his eyes with his covered up hands. You pat his little head "it's alright mugs, accidents happen" you smiled and leave to get the broom.
Cuphead looked at his brother who is still covering his little face "next time we'll practice outside ok?" Cuphead said and mugchild nods.

You come back and clean up the broken glass while mugchild sits there still feeling bad.