I think its very likely that was another lie. I'm betting Huma found out the same time we did.
That means he not only initially lied about the existence of his affairs to the public, he now lies publicly about what his wife new, at a time when he's supposed to be 'fessing up. He'd actually be putting her on public notice, that she'll now have to lie to corroborate his statements when asked. I just have a hard time understanding anything so depraved.