if he had been wearing anything dressier than clean , faded jeans and an oxford shirt , or if he 'd given the faintest look of doubt to her own unpretentious skirt-and-sweater combination , she would have said no , and if the place he took her to had looked too difficult ( it was the only word she could think of ) , she did n't believe she would have been able even to get out of his buick .