I'm the Villainess, So I'm Taming the Final Boss, Vol. 6 (light novel) — Sarasa Nagase

Claude has turned into a dragon, awakening as the demon king, harbinger of untold destruction. The world begins to swing toward what Amelia claims is the correct future where she's the true heroine. Even though the situation seems hopeless for Aileen and her friends, who have been beaten and battered, she wants to save Claude no matter the odds. Who cares who's a villainess and who's a heroine? Aileen loves her husband too much to give up, so the only choice is to turn fate on its head and forge her own destiny!