Texas is a one party consent state, you actually didn't need her permission.
https://guides.sll.texas.gov/recording-laws/audio-recording#:~:text=Texas%20is%20considered%20a%20%22one,%22reasonable%20expectation%20of%20privacy.%22
Edit to add:
I also think you'll be fine. This would be an easily disputable charge on your end. They aren't organized enough to go after people for non returns even if you didn't turn it in.
https://guides.sll.texas.gov/recording-laws/audio-recording#:~:text=Texas%20is%20considered%20a%20%22one,%22reasonable%20expectation%20of%20privacy.%22
Edit to add:
I also think you'll be fine. This would be an easily disputable charge on your end. They aren't organized enough to go after people for non returns even if you didn't turn it in.