imo, Its not cheating as cheating in my interpretation is having actual sex with another girl.

Altough I do think mostly women will feel like its cheating.
Besides that in a relationship its pretty common for men to have a harder time telling your fantasies as its somehow a 'sign of weakness' and ...

The idea behind it is to see how creative one can be with the sub/dom idea.

Is this a strictly "You are the slave" situation, or are the roles more open to interpretation?
They are completely open to interpretation, for example if you can combine the idea of being dominant and a slave in some way ...

Hello,

Point of this topic :
Imagine you could wish one ultimate mistress/master and situation that would be exactly like you want to.
If you want you can choose a concept like for example:
Time: the middle ages, roman times,...
Space: an isle, a boat, a castle, ...
Hobby: art, photography ...

found