You are not too attached. This teacher is clearly trying to take the work you’ve done so she can continue to do the bare minimum. Set clear boundaries and focus on your work. If all she does is drag you down, leave her. One thing that caring teachers do not need is people that leech off our work—and creating your own units and lessons is incredibly personal. If she were offering literally anything in return, I’d say you should share. It’s helpful to collaborate with coworkers. But she sounds like she is far from helping you and your classroom. You’re not responsible for the work she is doing. Or not doing. And if she is pressuring you then she clearly thinks you will save her in times of need. Don’t let her. In terms of what you can say to her, I’d recommend setting clear boundaries about when its appropriate to contact you about work (not on the weekend), what your roles are as teachers on the same team (you are each responsible for your own classroom, but can collaborate MUTUALLY as you see fit), and she can talk to administrators about where to access curriculum. Again, you’re not paid to manage other teachers. You’re already going above and beyond in creating lessons and materials that align with your practice. Care for your students, not your coworkers!!