My engagement was called off even though I'm a married woman?

"Rachel Granstear, your presumptuous behavior is unbecoming of a princess. I am breaking off our engagement." At those words announced at a grand party, the young lady who had been called out tilted her head in confusion. "Break off our engagement? Between whom and whom?" The one who suddenly announced the engagement dissolution was the Second Prince—someone she had no recollection of being engaged to. Besides, I already have a beloved husband...?? A story of a certain young lady who received a completely mistaken engagement annulment.