Don't dump her over this bump in the road. At most, talk it over. At least, let it pass. If a problem like this where relational equilibrium is not met in the future, then talk it over. If it continues too far and no equilibrium of love and money is met, then you should probably "dump" her.
Also, if you do decide to stay together, I recommend having a moderator delete this thread, because you don't want her snooping around later and getting all pissy because you had some sort of controversial thought in your past.