Is there such thing as bn happily married & cheatn?

I'm happily married to a good man w two cute kids...recently I got in contact w a former lover...he's married w two kids to...after some flirty & reminiscent texts of our life he asked to meet up. I declined but am flattered...I'm happy w my husband so y would I think about stepping out on him....anyone else been here? Ps.. w husband is very good...do u think he's done this before? I've been 4 yrs hes married 1....