Turns out she had a crush on a guy that was going to be at the party and bet her friend she could fuck him with me there. She obviously won. They fucked by the pool and she had me lick her clean in front of everyone.
Not only did she force him to wear a cockring and wank in public on the beach until he got an erection, she made him spurt a cumshot as she watched him publicly masturbate in the sun.