It's the pressure
C'mon guys. She's upset. In the back rooms of the Swarzenegger house, Arnold's private dizzying attitude towards women becomes more and more apparent to Maria. And trust me, there is some snarling and gnashing of teeth. I'm sure he does his best (ahem) to comfort her, but I'll bet you dollars to donuts, although she loves him, she might just be thinking of throwing him out the window....if only it's a fleeting thought.
This kind of embarrassment doesn't sit well with a lady with this much class.