The Demon Lord's Captive Bride

Mortal woman Faye saves Kaelen, a powerful being. He seizes her, takes her to the Demon Realm. Kaelen waits until she becomes pregnant with a Demon God. He attacks the Celestial Realm for blood to nourish Faye. He discovers Goddess Seraphina looks like Faye and is a vessel to sustain her. He brings Seraphina into the Demon Realm. Seraphina mistakenly believes Kaelen has fallen for her. Presuming upon his favor, she tortures Faye, causing the child's death. At the critical moment, Kaelen arrives.