She doesn't find one, but finds something else

Ruby snuck to the door, but it was locked. She started to look around for a key, when she found something unexpected: a large black strap-on that her captors had evidently intended to use on her. Whether driven by horniness or a desire for payback, Ruby could not help herself and quickly slipped into the harness.

Only then did she stop to consider her situation: Even if she caught the two unawares she couldn't take them both at the same time. Her only option was to go for one of the duelling warriors and hope that the other was now more interested in dominating her new opponent rather than attacking Ruby again.