I agree on drawing the line. I have no experience in this particular situation, but I really think you should stay in her husband's shoes and keep thinking that way. Think of her child too, even. The high school fool in me would say, "Dude, that's your high school crush and she's even hotter. What are you waiting for?" That's the kind of softy, romance-loving sap I am. But you have to curb the desire. Passion is rottenness to the bones. Yeah, it would be okay if she was unmarried, and even better not having a child. But she's not. You two are older now, not a couple of hormone-driven, lovey-dovey kids with minimum responsibilities. I really believe that marriage is a bond not to be messed with, and her child should be a symbol of that. There may be a reason for her flirting, whether it be she really liked you back then or she is just going through some trying times right now. But don't give in. She's probably half-serious and is waiting for you to meet her halfway, but DO NOT give in to the temptation. It'll be hard since she was your high school crush, but that was then, this is now. Sorry to sound so mean, but you have to have your mind over matter. The heart is easily fooled
You guys can stay friends, but that's where the line is. Not FTFs. Just friends. Hopefully, she's still the same sweet respectable girl you remember and hasn't change into a woman who gets easily unsatisfied and in need of something new. And hopefully, she'll get over this and you two can laugh at this someday
