Found out my roommate had been subletting her room on Airbnb while traveling for work

She traveled a lot for her job, I thought. Turns out she'd been listing her room on Airbnb and pocketing money while strangers slept 15 feet from my bedroom. I had no idea. Our lease explicitly prohibits subletting. If management had found out, we'd both have been evicted. I confronted her. She did not see the problem.