You get extra scenes if you choose to go with Catelyn rather than stay for sex with Sura. There are also two Catelyn paths, depending on whether you chose to obey her or defy her in the first encounter.
You need to take the all the dominant options for Daenerys, when she first has sex with Missandei, and when she confronts the shepherd whose sheep Drogon burned. Then on Dragonstone she will have an option to order Greyworm to have sex with her before he marries Missandei.