@Gas_Bandit https://www.nexusmods.com/stardewvalley/mods/3239 is the mod you're thinking of. She divorces Demetrius and lives with Leah, and is replaced by her "sister" Veronica who does all the carpentry instead.
Most farmers would of been married before their 2nd winter, for Grandpa reasons. Also at that point most people in the valley would think the Farmer owns his own private island that they visit all of the time.
