A second lyric “I’m gonna go home load my shotgun Wait by the door and light a cigarette, if he wants a fight now and he's got he aint seen me crazy yet”. This says she is out for revenge because she is waiting for him to come home with a gun and looking for a fight.
Third lyric is “His fist is big, but my gun’s bigger he'll find out when I pull the trigger” this shows how violent toward each other in two ways. One he is going to use his fist