Seriously, wives/girlfriends who are friends would start bickering because their husbands are fighting over a parking spot? You stand by your man but not over something so stupid. Why even get involved?
If someone insults your guy you will let it slide? Even if it's over something trivial and stupid? You're bigger woman than most i know.. i think it's normal that people take sides. In this episode it just escalated a bit the same as it escalated with the men.
Plus, it may have started over a parking spot, but once it turned into a competition over which guy was more accomplished (and, conversely, which guy was being most unreasonable) . . . well, then all bets were off!