My wife and I play stardew valley together. Her GOG client (1.2.67) offeres the feburary update, but mine does not. Why? She can update her game to the latest, but my client (the same as hers) does not offer this. why?

If your in galaxy then do a verify, un link any duplicate games and make gog primary.. if you're in 2.0 that could be a bug.

could grab the standalone installers/patches to bring them up to current.. always verify after a manual install.