Vault 76 has 'Programs' that everyone is issued and must follow for the good of the vault. Many of these 'Programs' are sexual in nature, but residents opt into them willingly. Samantha opts in, wanting to be an asset to the vault. This leads her down a path she never imagined, taking every wrong turn possible. Some points in this story jump between scenes rapidly, hopefully they aren't too bad to follow along with :)
The Master has a date with his slave and her friend, with the intention of introducing them into a bit of ff play. The evenings events are hijacked by the girls, but it is not long before the Master once more regains full control and has them where He wants them.
A Chastened, Florida Story They've split up, but then he gets a late night call begging him to come over. She 'has this problem' and only he can help with it.