Regretful Ex Who Cheated On You Ten Years Ago And Has Changed. What will you do?

A lot can change in ten years...

TL;DR: Cheated on you with a jock at her family home in high school. Regretted it, and tried to fill that hole in her heart by meaningless dates and a marriage (now divorced) since then. Resents herself for cheating on you and runs into you at a café ten years later...

A Post-NTR/Anti-NTR Story.