The Lying Moon Princess's Marriage: I Will Gain the Wolf God's Favor
After getting kicked out by her abusive husband and mother-in-law for being unable to bear children, Ume returns to her home village to learn her parents have died, and it's time for the yearly ritual to send a sacrifice to the mountain god. With nothing going for her, she offers to go in place of the girl they were going to send and meets Shoma, a wolf god with a muzzle who doesn't speak but writes things for her. He tells her that they'll have a trial marriage, and if they go one month without lying to each other, they will be wed. I like the FL, and the story is fine with decent smut, though I'm not really sure what the main conflict is yet. Trigger warnings: abuse, attempted murder.
The Dragon Prince's Ill-Mated Betrothal