I've been doing so much research on whether or not cheaters will cheat again, and the overwhelming evidence is that they will continue to cheat as long as they can get away with it.
My thoughts on this is that it is likely similar to the "research" all us LBS/MFSs do on whether or not our spouses will return. We look for ourselves in statistics, stories and even worse...clickbait on the internet.
Only you will know if you feel she will or won't repeat past behavior. Trust yourself, since right now you can't yet fully trust her. Your own gut and experiences will guide you.