Cadence Flaherty was a supporting character on American Reunion. Cadence is Michelle's sister and she was the maid of honor. Finch and Stifler fought over her. Both of them, switch personalities. Finch is Stifler and Stifler is Finch. Finch likes her, but Stfiler is only using her for sex. One thing you might know about Cadence that she never went to East Great Falls High with Michelle. If she did, she probably would stay away from Stifler. Cadence fell for Stifler, even when he saw his true colors. He made up for it. Cadence wants to lose her virginity, even though Stifler is an arrogant Jock and bully, he did have sex with a lot of girls. Stifler even made up his mistakes that he did in the wedding. Cadence was that close to lose her virginity to Stifler, but Stifler actually had sex with Jim's grandmother. Stifler won her, but their relationship didn't last long. They broke up after the wedding.
In a deleted scene, she went to band camp with Michelle and played the Tuba.
She never went to East Great Falls High with her sister Michelle Flaherty. If she did, she probably would have knew what Stifler's personally was actually like.