Am I being unreasonable or is she?

I’m getting married soon so we are of course planning our wedding. We want to do our first dance then have my parents and his parents also slow dance for the remainder of the song (it’s long). So maybe thirty seconds to a minute or so. The thing is, my parents are divorced. They got divorced 19 years ago and are friendly with each other now. My mom is not in a relationship, but my dad got married a year ago. He was with her for two years total.

His wife is throwing a fit and saying “that’s not happening.” She doesn’t want my parents to dance together. She’s making a huge deal about it. I find it annoying. Neither of my parents have issues with it and she’s the only one causing problems about this. There will be plenty of time for her to dance with him. All I’m asking for is the parents who raised me to be able to dance for a minute tops for my wedding.