If you are supervising when your slave gets trained, you may get events with her. She can fall in love with you if you are male or a dickgirl. Once she falls in love with you, she will charge you 10 GP for lessons if you personally supervise and have sex with you, giving Lust (Slaver) -3; however, growth of Swimming training will be reduced for that session (From 0.20 normally to 0.15 under Personal). If you are a woman, she can still have feelings for you (and Marine), but she will refuse to express those feelings by having sex with you and won't provide the discount (even at the highest lesbian trainer skill).
 Swimming Lesson
Cost: 20 GP