Your sister is lying on her bed in lingerie when you crawl into her bedroom.  She knows you came in to sniff her ass but she didn't say you could.  She also scolds you for being a naughty puppy as she found a pair of her panties she's been looking for. when she was doing laundry.  She noticed that you took the them and chewed up the crotch of the panties that had piss, brown marks, cum, and even red stains on them... which you seem to have gotten off off of the panties, you dirty perverted puppy!  Well she now needs to punish and discipline you.  She takes out a Nyla bone gag and secures it in your mouth with a head strap. From now on you are only going to be allowed to cum on her command, and until you get it right, there will be no more dirty panties for you!  She takes a dirty sock on the floor and makes you put your little red rocket in the sock.  She then takes your leash and hooks it to her dirty sock that's now on your little penis. She teases you by saying that the sock doesn't exactly smell like her foot scent, as it probably also smell like her boyfriend!  Your sister grabs the leash and tells you to make your red rocket nice and hard so she can start to give you a count down to when you have to cum on her command.  She starts the countdown from twenty.... you better cum exactly when she gets to zero, and if you don't, there will be no more ass sniffing and her dirty panties for you!