[Sicon]

They say once a cheater, always a cheater, but after my experience, I can say that phrase is patently false.

No it isn't. She'll do it again... and again, and again. If you can cheat once, you can (and will) do it again. You've already shown that you are capable of doing it - that you lack the honesty, integrity, and self-control not to cheat, and that you are selfish and/or gutless enough to cheat, rather than end the relationship that you are cheating on.

[Songcraft]

"She'll do it again... and again, and again."

Next, she'll set up a counter, so she can keep track of the tally of her sleazy sexcapades.