Can I take her back after she was unfaithful?

I still love her and know she would like to see me again but I doubt that she would be faithful. Should I accept that love involves giving each other freedom?
Though my immediate instinct is to tell you that you shouldn’t compromise your faith in fidelity to avoid losing a partner who clearly doesn’t share your core beliefs, logic tells me that, at 72, it can get pretty lonely on the moral high ground and, as such, you might find a more practical, less emotional, response more useful.