How does a woman decide?

What goes through the mind of a woman who's in a happy relationship with a man but finds herself not only developing very strong feelings for another man but also finds herself acting upon them?

Which criteria does she take into account to either continue her relationship or break up and go for the new man?

How does she keep the balance between common sense and emotions?

I realize every woman will act differently and not every situation will be the same, so I'm looking for general thoughts on this one.

Thanks for considering these questions!

How does a woman decide?
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