Here is the full list of all 13 Negligee: Opposites Attract achievements.
Sophie fouls your ball
Reach the disappointing end
Enjoying some food together
Playing a game of pool with Sophie
Reach the cute ending
Singing karaoke
Reach the wet ending
Watch Roxxie Perform
Enjoying a show with Sophie
Going ice skating together
Enjoying an ice cream
Be introduced to Sophie
Be introduced to Charlotte