Before we were married she had a reputation as fast and easy

She didn't marry them. She married you.

The past is the past and those guys are exes. They don't matter.

If you continue to be insecure about your relationship, consider counseling.

Counseling or do the girl a favor and divorce her.

to add to jespah - is there any other reason you have a so-called red flag?

Is it just her past that bothers you - if so to be blunt - that is stupid. If you love her as she is now and she is not being fast and easy with other men while you are married - really what does it matter. What matters is how she is with you now and how YOUR relationship is.

Put it to you this way --- the accumulation of your past experiences help make you into the person you are today. If she is a wonderful loving fabulous woman right now - maybe those past experiences has made her who she is now - maybe these past experiences actually makes her a better wife and makes her less likely to cheat?

Long and short --- if you love her and there are no other reasons to be concerned drop it. It is not a "red flag".

She didn't form a lasting bond with the other men. What the previous answers bring to light is the truth. If you have a good marriage that should be enough to end the speculation.