<human>: Can you condense the text into three sentences or less?

My girlfriend asked me to pass an online test (unrelated to relationships). 

One of the questions was "If you could cheat your partner with guarantee to be uncaught, how likely would you". After I completed and discussed result with her, I asked what she answered to that question. First she tried to change the topic, second she answered that she tried test several times out of curiosity, third she said it was either "likely" or "very likely".

To my knowledge she never cheated. I am confused; she could have easily lied about the test.

It is a serious relationship. I am confused.
<bot>: In an online test, my girlfriend chose an option that she is likely to cheat if she had guarantee to be uncaught and basically told me about it. Please advise!