She's a merely side character inside the story. So, as best as she can, she keep a low profile. When the male lead slash your boss would fell in love with a gorgeous female lead model, what would you do to keep a low profile?
Be an obedient fat nerdy secretary until the leads finally get their happy ending.
"Heck! But why this boss is different from what the book describe as he is?!"
***
A/n: My own story, so any resemblance to other stories are purely coincidence.