Avoid searching for or installing any mod that allows marriage to Jas without clear, explicit age-up changes – such mods violate Nexus ToS, risk your save file, and contradict the intended spirit of the game.
If your goal is to interact more with Jas without the controversial marriage aspect, several well-regarded mods expand her character: stardew valley jas marriage mod
To maintain the game's ethical and thematic consistency, these mods—such as the or related Social NPCs expansions—typically include: Avoid searching for or installing any mod that