Holly doll
The questions I really try to avoid are "is he cheating on me?" kind of questions. And asking about how your ex's sex life is going with someone else is a nunna. (Nunna yo' damn business.) I haven't ever had that question before but I'm sure it's been asked before.
I think each reader has to find their own comfort zone. There's nothing wrong with preferring not to read about certain things. The holier than thou attitude that can go along with telling the sitter you won't read about some specific thing is unfortunate, though, because it gives the sitter a feeling that they're a creep for asking and if someone doesn't feel good about themselves, they don't make more positive choices for themselves in the future. Other than that, though, it's up to you what you do and don't read on.
Totally agree with you; I tell the clients when they ask those "is he cheating/when will they break up/is he gay" questions that I won't answer that type of question; that it's not them, it's just where my boundary is. Hopefully they don't feel bad; they understand where my boundaries are & if they are uncomfortable with that they can perhaps find another to read for them...