וְ֠נָתַן הָאִ֨ישׁ הַשֹּׁכֵ֥ב עִמָּ֛הּ לַאֲבִ֥י הנער [הַֽנַּעֲרָ֖ה] חֲמִשִּׁ֣ים כָּ֑סֶף וְלֽוֹ־תִהְיֶ֣ה לְאִשָּׁ֗ה תַּ֚חַת אֲשֶׁ֣ר עִנָּ֔הּ לֹא־יוּכַ֥ל שַׁלְּחָ֖ה כָּל־יָמָֽיו׃ (ס)
l’homme qui a eu commerce avec elle donnera au père de la jeune fille cinquante sicles d’argent, et elle deviendra sa femme, parce qu’il l’a violée; il ne pourra la répudier de sa vie.
Tosefta Ketubot
Both the rapist and the man who spread false rumours about his wife's virginity (motzi shem ra), if they divorce [her], they force him to return [her]. If they are priests [and so can't get remarried to someone they divorced], they are lashed with 40 lashes. Whether its the rapist or the seducer, either she or her father can prevent [the marriage], as it is said, "If objecting her father objects" (Shemot 22:16) [proving her father's consent is required] and it is said, "She will be for him a wife" (Shemot 22:19)—i.e. with her consent [as well]. For him you can force, but you can't force him to be a levir.