now was quick enough to have an affair with a married man
"quick enough". LOL. You know nothing about the circumstances in which it began. Or what the cost has been to me personally. I'm not blasé about affairs or infidelity at all. But attacking me is irrelevant really because the issue on this thread is the OPs situation.
(and btw it is pretty rude to attack someone in the third person when I am right here!!!)
so her views need to be taken in the context of her trying, and failing, to justify her loose morals.
I'm not justifying anything. All I was saying was basically "a kiss is just a kiss" and "a kiss isn't sex". & I, personally, wouldn't end a monogamous LTR relationship over a drunken snog.
When you put it in the context of how common infidelity is (and of course I accept not all men cheat or have the opportunity to), a drunken snog that was confessed to is not the end of the world. It is unacceptable and not something that should be just overlooked. But to end a marriage over it is not what I would choose.
A separate issue here is whether in fact it was a one-off drunk snog but that is for the OP to decide.
It's just my opinion. Accept or reject as you wish. But there is no need to do so with personal attacks.