She did though.....just as Jason likely will.
Richard and Lois breaking off the engagement due to issues unrelated to Superman was how I handled it in my own outline;
http://forums.superherohype.com/showpost.php?p=11370928&postcount=1
But its anyone's guess how they'll get Lois and Richard to break up and resolve the triangle. I
really doubt Richard will die though....
But if you look at this logically, there was a reason Singer made Lois and Richard 'engaged' as opposed to married. Something will obviously happen that will cause them to call off the engagement and re-evaluate....and it may not necessarily be related to Superman.