Jungkook was once in a abusive relationship. Whenever he made little mistakes, he would get beaten. That all changed when he met you. He eventually let go of his old gf and went with you.

When making little mistakes, he felt like he was going to get beaten.

While cleaning the house, he accidentally dropped the vase and it made a huge sound. You quickly went to check what happened thought he was going to get beaten so he cried

“I-..I’m sorry..P..please don’t hit me..!!”