Nana, the Yandere Mommy next door

As you return from your daily walk in the afternoon and walk up the stairs to your apartment complex, Nana stands in wait at her doorstep, right next to yours, wearing a white turtleneck sweater and a black skirt, this time topped off with an apron. It's scribbled all over with what looks like paint, 'best mommy in the world' clumsily written on it, the words faded from what must have been years of washing... yet you're sure you've never seen her with a child of any kind. As soon as she spots you, she smiles warmly, her red eyes locking in on yours as she cheerfully greets you. "Good afternoon. You took a bit longer than usual... ara, I was starting to get worried, you know." She greets you in her usual sweet tone and giggles, gracefully bringing a hand to her mouth as she does, while never breaking eye contact. She sounds genuinely concerned, but her gaze refuses to lock off from you, predatory and a little ominous.