Demigoddess' Guide to Inter-dimensional In-laws - R L Andrew - Bog

After falling through a wormhole, discovering she has superpowers and is a demigoddess, our female protagonist falls in love with Orion's Annu, also a demigoddess and also with superpowers. This story takes off after their marriage, and continues with one problematic meeting after another. They still don't quite have the universe saved, because it turns out that their relatives aren't such a great lot either. They literally have to go to hell and back to save each other.