<human>: Can you provide a brief overview of the text?

Okay guys, so I've been dating a girl for about a year [we are in college]. She revealed to me about a month ago that she cheated on a boyfriend back in high school. I would never stand for this in adulthood; if it were me being cheated on, I would be single relatively quickly barring some very specific circumstances. I'm trying to be mindful of these events, especially since it happened when she was young [when people make really rash choices]. I can see both sides of the argument: people can change and I shouldn't discard a good relationship over someone's mistake in the past. However, people don't "just change", and the ever-present saying "if s/he cheats once, s/he will again" kind of looms in the back of my head.

My questions to you, /r/relationships, are as follows:

1) Should I press for details? I've never dated someone who was unfaithful before. I have, however, dated someone where I wasn't their first, and I know how unsettling it is even after you force details out of them. I worry this may be more of the same. Am I going to regret asking if I do?

2) Is it rude to ask? Sure, we are in a relationship and most everything is shared, but is there any risk this sours the relationship? We are at a fine place as is [aside from my mild to moderate discomfort on this].

3) What do I do with the knowledge afterwards? I understand this is probably nothing anyone else can answer specific to my life and my relationships, but I would like to hear from those with similar experiences. What did you do, did you end up happy with the decision, or do you regret it / wish you acted differently?
<bot>: My girlfriend has cheated on someone in the past. It it unwise to press for details? If no, how can I tenderly do so? Thanks!