The Perfect Assistant (2008)

CEO David Wescott greatly appreciates his trusted office assistant Rachel Parsons's efforts to help out in the Wescott household too when he loses his wife, leaving his child semi-orphaned after an ailing disease. Rachel stops at nothing to make herself seem indispensable in both spheres, aiming for her boss's exclusive attention. She's confident a business trip to New York provides the perfect opportunity for her to propose, but realizing she schemed to intrude his intimacy, he puts her in her place, planting the seed for spiteful revenge at a corporate dinner.