This is not a statement, it is an offer. A woman is giving you the chance to come up with whatever excuse or reason you have for doing whatever it is that you have done. You have a fair chance with the truth, so be careful and you shouldn't get a "That's Okay".
这不是普通的陈述，而是一个提议。女人说这句话的目的其实是给男人一个为其所作所为找个借口或理由的机会。你也可以说实话，但得小心谨慎，这样就不会听到"That's Okey"。