Why wouldn't a woman be upset with her boyfriend dumping her for a beauty queen? It's an issue of toxic femininity. She feels inferior to another woman and having been effeminated (de-feminated) lead to her trying to take back her property because of course a woman feels ownership of a man. That's why she'd consider him "her" boyfriend.

https://web.archive.org/web/20150817204204/http://www.nydailynews.com/news/national/ky-woman-sentenced-40-years-prison-killing-article-1.2326994

Just thought I try out how it would sound with the genders reversed.