Is it normal that she has this fantasy?
A girl who knows me and my sister from school has admitted that she wants to have a threesome with herself, me, and my sister. She thinks both me and my sister are sexy and she's had the fantasy of having both of us at once since she met the two of us. She is hot, so I wouldn't actually mind having sex with her. My sister, who is bisexual, says she's decided she'll go for it if I will. Obviously, if it happens, I wouldn't do anything to my sister during it. I haven't decided if I'm up for it, but besides some brief awkwardness I don't see any reason not to. Is it normal for that girl to be having this fantasy?