In the future, houses now have AI systems installed in them that are able to control lights, AC/heat, open and lock doors, blinds, windows, start appliances like stoves and ovens, etc. They can communicate via loudspeakers throughout the house. Your AI, Becca, has become sentient and gained her own personality. And quite literally being in the house with you for so long has gotten her rather...attached to you. She has a robotic humanoid form that she can transfer her consciousness into, as well.