Married woman [F] pursuing me, single male [M]

So, I may be in the wrong place for this but I’m kind of new with Reddit and need some advice from someone with experience. I’m 31 (M) and have known this chick (43) for a couple years. She’s a smoke show. She teaches the line dancing class I go to and after a year of going, last night she sent me a message that said “stop looking hot.” That started a rather fast moving conversation about how she wanted to essentially have an affair. Her husband is in the military. We have mutual friends and often see each other out but her husband is always gone. I consider myself a mortally sound person but the temptation is killing me. It’s what every guy, at some point, dreams of! No strings attached, I’m sure the sex will be amazing, but it’s giving me anxiety. She’s soooooo cool and I saw her as one of the guys until she starting hitting on me and now it’s just a constant conversation about when we’re going to meet up and finally hook up.

Someone please give me advice here. Steer clear or go have fun???