Caught Myself Cheating on an Ex-Wife with a Student

I just can't believe I let this happen. I thought I was done with all that nonsense after the divorce, but here I am confessing something so shameful. It started as just flirting over email, nothing out of line at first, she was a bright student and seemed eager to learn. But one night, drunk on old habits and new desires, we ended up in my office late at night. She kissed me, and everything spiraled from there. Her lips were soft, her body young and willing as I touched her for the first time. We fucked against the wall, clothes barely off, me losing myself completely in the rush of it all, her tits bouncing, fingers gripping tightly into my ass while she ground onto me. She whispered dirty words to keep me going, moaning louder with each thrust until we both came hard against each other. It was so wrong but also everything I wanted right then. We broke it off shortly after, but now the guilt eats at me daily. I don't know how to make it up to my ex-wife or even this young woman, both long gone from my life now. All that's left is shame.