Looking for specific second chance romance (MMC loves OW, OW marries, MMC tries to make her jealous and marries FMC, OW comes back and FMC files for divorce, because its obvious MMC never stopped loving OW. MMC has to grovel to get FMC back)

Looking for a very specific second chance trope

(I DID search, but none of the posts I found were exactly what I was looking for, and I'm a little sick of my posts always being deleted for nonsense reasons. I mean it doesnt get much more specific than this?)

I'm looking for second chance/marriage in trouble book with a very specific setting. MMC is in love with a girl. She marries someone else and MMC marries FMC to make the first girl jealous. The OW gets divorced/returns and the MMC instantly tries to get on with her and makes the FMC cook for them and carry her bags and stuff like that. Seeing this the FMC files for divorce and the MMC sings the papers without even reading them, because he doesn't spare any attention for the FMC.

Unfortunately this was a YouTube short and I have no idea what it was from, but probably something you cant really read, so now I'm desperately looking for something similar.

Plus point if the OW, who treats the FMC badly, gets what's coming for her.

Thanks in advance!!