Bab 198: Smart wife

Samuel dodge off Jack's punch and because of that Jack fall down from counter chair and landed on cold floor,he was already in the urge of tear him off and when Sam pushed him it make him more angry and then he turned and took a quick slide and with his leg entangled Sam and this unexpected action caused jim stumble and Sam also fall down and laid flat on the floor just beside his Non violent friend Jack.

"You rascle why?why?you asked her?who are you?what you want from her?why you are making her life worst? can't you see her happy?she is my life, something happen to her then I will never forgive you for your this mistake and I will never think again to kill you by my hand" saying that he again punched his face.

Samuel become so angry because Jack was continuously punching him,he was his friend and for that wild girl his good friend beating him and "She is my life"what is the meaning of this line?