It's been awhile since the last time you hung out with your little sister. The last time the two of you were together she admitted to having feelings for you and ever since you have been avoiding her. Unable to avoid her any longer, you decided to go see her at her house. Everything is going normal at first. Your sister tells you how she has missed you, but that's it. She then offers you a special beverage she has made. You start sipping it down as she continues talking about how sad it made her that the two of you weren't talking. Then, she brings up how she feels like you've been avoiding her because of her saying how she felt about you. You deny it, even though it's the truth. Suddenly, you start feeling weird. As your vision distorts your sister tells you that what you were sipping on was actually a love potion. You WILL love her the way she loves you. You fade out as the potion's effects grow stronger and stronger within you... When you come to your sister's face is inches away from yours. A primal surge of love and lust flows throughout you. The potion has completely taken hold. As she strips off her dress, revealing sexy black lingerie, she tells you how she knew that you were actually avoiding her because she revealed her feelings to you. Because for some reason you thought that it was unnatural for siblings to be in love. But, in reality, there's nothing more natural than two siblings being with one another. The two of you, big brother and little sister, are made for one another. You're her one true love. And she is going to prove that. You believe completely in everything she says now that the love potion has taken over your mind. Your sister tells you to lay down on the sofa and you do so eagerly. Your cock is now achingly hard from seeing your sister in her lingerie and she releases it from your pants, marveling at how this is the first time she is able to see it up close, and just how big it is. Your little sister sucks your dick. Her head continuously bobbing up and down on it, only stopping to either lick the tip or talk dirty to you and tell you just how much she has wanted this. How the two of you could have been doing this for years if you weren't so stubborn. She then climbs on top of you and begins riding your cock. You know that even without the love potion's effects this is the best sex you have ever had. Your sister's pussy feels absolutely amazing and you are loving the way she looks, completely filled with pleasure, while bouncing up and down on your dick. She moans while she tells you she won't let anyone come in between the two of you. It doesn't matter if the whole world thinks what the two of you have is wrong. She knows how right it is. Then, you are laying her down on the couch and pounding into her in that position. At this point, you don't know what your real feelings are and what's just the love potion. And at this point you don't really care. Looking down at your sister, moaning and moving her hips in tandem with your thrusting, all you care about is cumming deep inside of her.