personally for me, i won't want to shit at where i work...furthermore, she knows about your partner? both of you may be keen now but you don't know what may happen 6 months down the road....
if she is just a waitress, a salesgirl i meet in malls for instance...i don't mind trying my luck but definitely not doing such a thing in my office...
my 2 cents worth....but i may be wrong hehe
