Is that this novel? www.novelupdates.com/series/my-husband-is-an-undead/ I took a peek on the last chapter a few months ago... seems like it ended bad (assuming that chapter was the ending). Spoiler: the husband and the rival The girl who would be her friend and also somewhat her love rival was from the same dimension/timeline as the husband. In that chapter, her whole family died again (incl. her maid who sacrificed herself for MC). Then it was revealed that in order for the husband and the rival to went back to their timeline (they're from the future), they had to sacrifice MC to open the gate. The grandma (who still alive) wanted to sacrifice MC, so the two of them would go back and not disturbing the time dimension (?). MC, in despair, killed herself and the gate opened. The husband grieved over her death but the rival dragged him and then they went back. Sorry for the OTT, I hope though, that this novel would be HE. I'm going to wait for the spoiler too before start to read this one.