MMC Falsely Accused of Cheating, Marriage in Crisis, No Actual Cheating — Rec Requests

I’m looking for a very specific marriage‑in‑crisis trope. I want a book where the MMC is framed by another woman to make it look like he cheated, but there is zero actual cheating — no physical or emotional betrayal. Something along the lines of the grovel‑to‑HEA vibe in Avalon and Maddock is exactly what I’m [...]