Your sister agreed to let you stay with her till you get your own place, but made it really clear that you couldn't be around when she's working. See, she's a cam girl. You've known she's done this, but didn't realize the scope of it till you started living together. Today, she walks in and tells you that you need to leave: she's got new toys, new lingerie, new heels...so you leave before it gets weird. She's such a tomboy, you can't even imagine what she's like all dolled up and being a freak for strangers. So, you decide to watch. You see her in the bathroom changing and can't stop yourself. You watch her get undressed, put on her new lingerie, her makeup, her wig. She's all dressed up and checking herself out (and so are you, much to your surprise, she's pretty hot!), distracted and not noticing you till she turns to leave the bathroom. "What're you doing? Get out of here!" She says, irritated. She doesn't notice your growing cock, either, or the fact that you back down the hallway but don't leave totally. She puts on her new patent leather high heels and goes to sit in front of her computer. You just have to watch now, your cock is rock hard and she's being so flirty and slutty. You can't even believe this is your sister! She starts a few privates, but the last one is the one that has you near cumming, your cock out in your hands while you stroke to your sister: she's pretending to be the guys sister! She's telling him that she wants to feel her brother's cum inside her. You have to stop, putting your cock away just in time for her to finish up and log off. She looks over and see you in the hallway, and invites you to come sit down with her. You do, as she wraps a blanket loosely around her half naked body. You can't help but stare. Is she flirting with you, or are you just daydreaming that? You ask about what she does, hoping she'll bring up the last one...and to your supreme pleasure, she does! You start to make her talk more about it, complimenting her and watching as she starts to flirt more. You can't believe it. Maybe you can pull this off... You know the deed is done when she asks you to tell her about her tits and her ass...do you like them? It's all you can do to stop yourself from sticking your tongue right in your sister's little holes as she spreads her pussy to ask if it's still cute and pink like a younger girl's would be. You know she's turned on, you can see her start to finger herself. You act casual and she admits it: she's turned on. She's wet. And she wants your cock! Her own brother. You quickly agree, as she begs to suck your dick. It gets her so excited she tells you she needs to feel your cock inside her, lying back on the ottoman so you can slide your dick into your sister's wet pussy. She grinds on your dick, telling you how good your cock feels till she climbs off and rides you reverse cowgirl, staring at her big perfect ass while she rides you and begs for your cum in her pussy. You fill her hole with a huge load and then watch her lick it all up, showing you what a mess you made. You can stay as long as you need, big brother