I smoke prank went wrong!!!

I love to prank people! especially my older sisters today I decided to prank my older sis my 15 year old sis (last time I tried to prank her but it went wrong ) I wanted to see her reaction when she sees me smoking of course I didn't really smoke I was holding chocolate cigarettes and I put a lighter beside me when she got inside the room she was just looking at me for like a minute then she said : what are you doing ?!?! Me: (pretended to look nervous) n-nothing...then my sister said that she is going to tell my grandma! then she ran out the room!! I couldn't stop her I didn't have the chance to tell her that it is just a prank! My grandma came with a shoe 😂 She was chasing me with it around the house I told her that it's just a prank!!! A PRANK!!! When my grandma finally stopped chasing me I went to her and explained to her that it's just a prank she laughed then smacked me 😂🤕 My sis said that she knew that I wasn't smoking for real she told grandma just so I get in trouble the prank went wrong n my sis said she won no she didn't!! 🙄