Bayu Bayushki Bayu

"The boy's smile was terribly familiar; the way it crinkled his eyes and showed a flash of teeth tugged at something deep within Natasha's soul. Because the last time she saw that smile was almost twenty years ago, in a cheap apartment in Prague, lit by a cracked iridescent bulb, half-veiled by a curtain of dark brown hair..." (Slow burn Natasha-as-Peter's-mother/MamaSpider! fic.)