Having spent his recent life rather...quietly, Nathan was in no condition to use more of his pyros in order to remove or manipulate the young woman's memories. Instead, he had his wits, charm, and logic. At the moment, more logic. Hearing her honest response, he couldn't help but chuckle, tossing some of the longer strands of hair as he tilted his head, looking her over. Large doe-like eyes, seamless, 'real' living skin, hair wild and natural...unlike his own, dark locks, which stayed as dead and immobile as he'd leave it. For a moment, he wanted to let himself become jealous, glare down at her before using his pyros to rob her of her memories...but no, that wouldn't do. That would never do.
Head still tilted, he ran a hand through his hair, giving her an interesting smile, "I did look strange, didn't it?" Taking his time to sigh 'wistfully', before glancing at his grandmother, Nathan turned back to the girl, "I haven't seen my grandmother in a long time, I was surprised that I recognised her, let alone surprised that she recognised that action." The left needed no explanation. Implications were leading, but sometimes too obvious to the paranoid and sceptical who had the scenarios running in their head. Leave it vague, and let her interpret as she will. Let her imagination go this time. The main thing was to not treat this like a big deal. If she lived in this city, he would likely be able to plant and explain more as time progressed.
From a distance away, the old woman seemed to realise something, "My soap! My soap!" Unsure of what she meant, Nathan quirked an eyebrow up, but before he could turn and call back to her in response, "My soap opera is starting in an hour minutes, let hurry on home now!"
A look of realization at what she meant, and a kind smile, "...alright, grandmother."
Hobbling over to the two of them rather quickly, the older woman seemed to realise something. Fumbling with her pockets, she pulled out a napkin and a floral pen, "Dear, I'd very much like to get a copy of that photo. Can you come 'round to this address with the picture? I'll pay you!" With this, the old woman held out her address and phone number, scrawled on the clean napkin, to the young woman before her.