I Lied About My Sandwich Being Gone

So, here's the thing, I'm a bit of a sandwich hoarder. I love sandwiches so much that when my younger sister steals one out of the fridge without asking, it makes me a little unhinged. Anyway, this morning, she came into my room holding my favorite ham and cheese sandwich while I was still in bed. She knew how much I loved it, and there's nothing worse than waking up to the smell of your perfect breakfast being snatched away right before you can eat it. I told her that I'd already eaten mine because she caught me with half a slice of bread crumpled up in my hand from when I woke up groggily, looking for my sandwich. She didn't believe me at first but then shrugged and munched happily on my lunch. The rest of the day was awkward, I kept glancing over to see if she could tell that I was lying, though the sandwiches are so ordinary-looking, there's no way to know unless you bite into one with a missing piece. I felt like such an asshole for lying about it when I had more bread in my room. But at least I made her think twice before stealing from me again, though that's not exactly the kindest revenge ever. Now she keeps my sandwiches locked up in the cupboard, which is ridiculous because they're mine! This whole mess is just another reason why I'm glad I'll be moving out soon.