I don't know, it could go one of two ways next time they row. One, things get to he fever pitch and she starts getting violent again (in which case I hope for his sake he realises it wasn't "just a one off" and gets the hell out of it). Two, things get to fever pitch and he yells "what are you going to do, stab me again?" which, assuming she isn't generally violent or utterly psychotic, will probably upset her quite a bit but completely deter her from any form of violence.