פירוש על אסתר 4:16

Even though it is unlawful. For it is contrary to the law for one who has not been summoned to enter. And the Midrash Aggadah [explains], “even though it is unlawful,” [to signify], “for until now I was coerced [to live with Achashveirosh], but now [I will do so] willingly.”⁷Maseches Megillah 15a.

And as I am bereft, so must I be further bereft. [I.e.,] “And just as I have begun to go to destruction [by appearing before Achashveirosh without being summoned], I will go and die.” And the Midrash Aggadah [explains], “as I am lost [i.e., orphaned] from my father’s house, so will I be lost to you, for from now on, that I am submitting willingly to a heathen, I will be forbidden to you.”⁸Because the Torah forbids a wife to her husband if she voluntarily had relations with another man.