Almost got caught. Give me some ideas. FAST. IT HAS BEEN MINUTES N I MIGHT GET IN DEEP SHIT SOON

Was just smoking a joint in my balconey. I heard some footsteps n instantly threw it away. However there was not any distinct smell. Then my sister opens the door n sees me wearing my tee shirt. Was smoking shirtless. Then asks what i was doing in a curious n frightened way.. i said i was sweating so i stayed in the balconey. She then left. Then i was putting my lighter in my pants and a minute later she came n asks what i put in my pants. She was probablu hiding behind the door. I said nothing n acted sad n pissed a bit. What should I tell her when i see her again about what i was hiding. Or what should i use as a decoy (planning to purposely hide an item n purposely get caught by her then showing her it) . So she will think i wasnt doimg anything bad.

WHAT SHOULD THE ITEM BE PLS SUGGEST FAST