I'm not so sure she'd feel envious or jealous that I was outshining her because of my shoes. Pretty sure she gets her style self esteem from make up, sparkly dresses, and a cohesive rocker chic look.
On occasions when she wears the black pumps, we'll probably match. For example, next week we go to Paris. We'll do a night at The Ritz. She'll wear an elegant dress, the black pumps. And she said, "we'll look so good together" in response to me wearing black leather pants and black pumps. Anyway, if she feels jealous or envious, we have good communication so she'd probably open up about it.