Dan had just finished inside his daughter's childhood best friend while watching his daughter get railed by a masked superman. He couldn't believe his ears when Callie asked Amy if she wanted to switch. It was one thing to watch his daughter have sex but it was quite another to have sex with her. Dan's head was reeling! He had, like many dads probably do, thought about it before. Especially as Callie got older and looked more and more like her mother. In fact, she was now the same age as her mom was when Dan first started dating her.
Callie was as surprised as anyone when she asked Amy to switch. What Amy and Dan didn't realize was that Callie had figured out that Spiderman was her dad. Callie had heard Dan privately masturbate over the years and she recognized his grunts and moans. The question now was did she let on that she knew? Callie and her Dad had been alone since Mom died. Dan really hadn't dated much as he put all his effort into raising Callie. When her mom died, Callie was 10 and for a few months Dan had let her sleep in the same bed as he did. Pretty soon Callie started puberty and Dan decided it was more appropriate that Callie and he not sleep together. Callie grew up idolizing her dad and maybe like other girls fanatsizing about making love to him. As Callie got older and developed into a young women these feelings didn't go away. She would sometimes tease her dad by wearing just her bra and panties as she got up in the morning or just a towel after a shower. She was sure he noticed but he never gave any indication he would do any thing with her.
Amy was torn. She had loved Dan for years and now that he had been inside her she wasn't sure about sharing him. She and Callie had talked about fantasies over the years and while both had never specifcally said they wanted to sleep with Dan both sorta figured the other one did want to. Amy was a little worried that if she let Callie have sex with Dan that he would pick Callie over her. It wouldn't be the first guy to be more interested in Callie's big tits.
Superman broke the trance everyone was in when he walked over to Amy with his hard cock pointing at attention and announced he was ready to switch. Amy whispered to Dan that she was cool with it if he was but that he should let Callie know before anything happened. Dan kissed Amy hard and looked over at Callie. Dan walked over and sat next to Callie. Callie thought she might pass out. She had dreamed and masturbated about being naked with her dad for years. And now here he was, right next to her and rock hard. Dan started to speak when Callie looked up at him and said, "Dad i know its you". Dan's heart jumped! Oh fuck now what. Callie quickly calmed his nerves when she reached out and started to stroke his cock. Callie looked over at Amy and mouthed "OMG Dad".