Devour Me, Baby by Fiona Davenport

Guy Rule: Don’t steal from the company pantry.
Celebrity chef Owen Walker was ready to hop out of the pan and into the fire the moment he laid eyes on Sienna Moore. The pretty college student was in his office hoping to land a job as a waitress, but he had another role in mind for her.
Sienna never expected to be personal assistant to the hot, famous chef she’d secretly lusted after. Let alone living in his house and sleeping in his bed.
Juggling her new job and school is a lot to handle… and that’s before she discovers she’s pregnant with his baby.