Cheated with exgf from distant past [MF]

First time telling this story- this happened 4 years ago, I was 35 at the time. My wife and I were in a bit of a sexual rut and I was craving excitement. One day at work for whatever reason, I decide to DM my ex from HS, who we’ll call Chloe. She was then 33, married with kids, like me. We broke up the summer after I graduated when I left for college. We remained friends afterwards, never really hung out, but sometimes ran into each other at bars and parties for a while. At the time, though, it had probably been several years since I had seen her (aside from Facebook). Based on her FB pics, I could see she hadn’t changed much and was still an extremely attractive 5’5” petite blonde B cup. She hadn’t lost the perfect legs and ass that I loved so much. I was also what most would consider attractive at a fit 5’10” 170.