If you successfully install version 1.67.2, keep in mind that The Sims 3 is notoriously unoptimized for modern hardware. You may need: To fix frame rate stutters.
She could leave. She could walk out, drive back to a life made of plausible excuses. Or she could press play.
Instead, you are likely greeted by one of two things:
Assuming all parts ( part01 to partNN ) are present in the same folder:
You get online features (the Exchange, launcher updates), no malware risk, the ability to install mods safely, and customer support.