First of all I think every couple experiences jealousy totally differently, wheter you are gay/straight and vanilla/kinky. So I can only talk about how I experience it and see it with others.
The rules are clear: Master is free in His sex and "play"-life, His slave is not. So Sir has no reason to ask me or even tell me when He fucks or uses another sub. We are both totally clear about that! On the other hand I have no say in my sex or "play"-life, it is totally controlled by Master.