I have grown a Fockea Edulis for years in the house with no problems. I don't remember when I got this. It goes out in the summer and must be pretty tough because I tend to overwater and it has done great. I now use semi-hydroponics so I don't have the rotting problem much anymore, thank goodness. I have even put the Fockea right in the garden for the summer and it really liked that. I do grow mine under lights even though this one has gone to sleep. I also give it some water so it doesn't lose it's roots.
I do grow my adeniums the same. Sometimes they will lose their leaves and sometimes not. I have had flowers in the winter also. The Fockea will probably not be dormant for long since I have it under lights and it is pretty warm.