As Sandra slid into her little black dress, she couldn't help but admire herself in the mirror. Sure, she knew she was more than a little bit vain, but it had served her well so far in life. After all, if it wasn't for her vanity, her twin sister Cassie would've never gotten to finally fuck her longtime crush, Dean McCann. Cassie also wouldn't be in her own room right now, getting ready for the night of her life. It might've taken more than a decade, but her dreams were about to come true. And so were Dean's.
Sandra never told Cassie that she and Dean had fucked quite a bit back in college. Although he had gone to a different school than the twins did, she'd run into him at a party on his campus, and he began inviting her to visit for a while after that. Now that Cassie had witnessed them hooking up, it seemed pointless to hide the truth any longer. She just hoped that everything she'd done for Cassie over the last few days would make up for it.
Last weekend, her old sorority sister Ally Simmons had texted her that Dean was back in town. She'd seen him at a local club a few times, and he remembered her as one of the girls who Sandra would bring with her occasionally during her visits. After chatting with him for a bit, she learned he'd recently returned after getting a new job. She also added that he looked as hot as ever, still maintaining his slim, toned swimmer's body. Sandra was a little jealous to hear that Ally had fucked him, but it sounded like it was a one time thing.
While she had always enjoyed being with Dean, it was marred by the guilt she felt afterwards for betraying her sister. Now, however, she had a plan to make things right, and finally give Cassie the thing she most desired. Knowing exactly how to entice Dean, she made sure to wear knee-high boots and fishnet stockings with a short, tight skirt and a low-cut top. As she expected, it worked like a charm.
Unfortunately, it ended up working a bit too well--while it had been Sandra's intention to draw Dean in, initiate a conversation between him and Cassie, and then subtly depart so they could be alone, the alcohol she imbibed during the process severely hindered her judgment. Instead of following through with her grand plan of setting Dean up with Cassie, she found herself being led by him to the dance floor, grinding up against him, and getting lost in her lust while her sister looked on from the sidelines. It was like Cassie fell right back into the way she was in high school.
The rest of the night felt like a blur of ups and downs for Sandra. She had invited Dean back to their apartment, and when the Uber came to pick them up, she hurried past her sister to get in first, letting Cassie sit beside Dean. He was clearly very intoxicated, and was dumbly staring out the window, so Sandra tried to get Cassie to make a move. She leaned over and rubbed Dean's bulge, hoping it would entice her to do the same. In her mind, if she could just get Cassie to push through the walls she'd erected around herself, she would be able to cut loose and have fun.
Despite her outwardly shy demeanor, Sandra knew her sister was just as horny as she was all the time. Cassie had no idea that Sandra enjoyed secretly watching her masturbate, and Sandra always got a chuckle from Cassie's peculiar tendency to give her dildo a blow job before going to town on herself. Initially, she assumed Cassie sucked on it for lubrication, but it soon became clear that she was taking far more time blowing the fake dick than was necessary. Even if Cassie didn't recognize it, she was subconsciously fantasizing about sucking off Dean. There was one time where Sandra heard her moan his name while her lips were wrapped around her dildo, making this fact obvious.
The moment Dean pulled his cock out in the back of the Uber, Sandra thought the sight of it would overpower any reservations that were holding Cassie back. To her chagrin, her sister didn't jump at this gift-wrapped opportunity. Dean's massive, throbbing cock was just standing there, begging to be sucked, so she ended up leaning over her sister to take that hunk of man-meat into her mouth. Once it slid past her lips, she couldn't stop what was going to happen next.
