Maryanne did note the correction, blushing when she realized she might have said something completely off. But didn't know exactly how to sign her whole question. So she pointed to her lips, the idea of him watching her mouth was just as appealing after all. "What did I actually say?"
Even after the question she moved on to sign: I'm better now. Of course she hoped that was obvious. He made her happy, when she wasn't. That special zing that she got when he was around. And her woes seemed to just vanish.