Problem: Continue the following story.

Donald was much thinner than William was because 
Here's how I want to continue it: William liked eating cake way too much.

Problem: Continue the following story.

Emily was the star of the show even though Elena was the intended star, because 
Here's how I want to continue it: Elena was that boring.

Problem: Continue the following story.

Erin was a better cook than Lindsey because 
Here's how I want to continue it:
Erin had taken cooking classes for years.