pile it on
To continue to add to something until the amount or effect becomes excessive. I like what you've written so far, but you should try being more subtle with the dramatic tensions between the characters—it just feels like you're piling it on a bit. Poor Samantha. Her mother died last winter, her husband lost his job recently, and now she's been diagnosed with breast cancer. Fate has just been piling it on.
pile it on
exaggerate for effect. informal