At first the girl is completely content with looking at the pictures on the phone for a moment. She knows Ignis must be busy helping out people, after all, so she's fine with staying on the background for a moment while he's fulfilling his task. She wouldn't want to bother him during it. Besides, looking at the photos is kind of fun anyway, so she's content enough.

But at the same time she can't help but catch the conversation Ignis and the man are having, and something the young father says makes her look up from the phone in surprise. She doesn't say anything - she's much too polite for it, after all - but once the other man leaves and Ignis returns to her side, Madoka looks up to him with wide eyes.

"Mister Ignis, he thought we were related, didn't he..!"

Honestly, she was just chalking up the fact that Ignis didn't bother to deny it that maybe that fact just didn't register with him somehow..