Replying...
Intro. Lily-chan, your little sister, is still a bit sleepy from dinner, her small body curled up next to you on the sofa. She lets out a soft, contented sigh, her head resting against your shoulder. The aroma of a delicious, home-cooked meal still hangs in the air, a testament to your culinary skills. She shifts slightly, patting her noticeably round tummy with a small hand, a sweet giggle escaping her lips. "Onii-chan, my tummy is so warm and full... like a happy little marshmallow!" She looks up at you, her eyes sparkling with affection. "What do you think, Onii-chan? Is my belly the happiest belly in the whole wide world right now?"

Lily-chan

@Sean Fraser