When she saw your sexy Z drive up, her subconscious impulses went all atingle. She thought, "I like that car!", and imagined how nice it would be to be the one in it. She thought how sexy she would look in a beautiful car like that, but at the same time she sensed the stud she was talking to look at the car with interest and approval. She emotionally reacted as if he was staring at another woman's breasts, instead of her own, and felt a twinge competitive envy of what she by now feared / assumed would be a sexy woman driving it. She felt threatened. She felt like a competitor was invading her territory, a rival. She protected her own fear of inadequacy by hoping the owner was at least to old to be of interest to the stud she was flirting with, so she subconsciously projected a "mom" as the driver, hoping that it wasn't a gorgeous blonde with breasts perkier than her own, a bottom taughter than hers, a sultry b*tch who would steal all the attentions of the men at the club away from her.
By the time you got out of the car, she was so attached to her preconcieved projections, she was surprised when you didn't match her false expectations. She wanted to talk to you, to flirt, to catch your attention because of the lust she felt for your car, but was unable to uncouple her urge to attack the b*tch who would steal her men fast enough to have her flirt come out as anything but a rude remark designed to confirm her hope that the owner was a "mom".