Some documentaries and news stories about escorts provide insightful glimpse into their private lives:
"The best documentaries about sex workers on Netflix"
https://www.dailydot.com/upstream/sex-worker-documentaries-netflix/
‘Escorts’ Takes An Unflinching Look Into What It’s Like To Be A Call Girl
http://decider.com/2017/01/06/escorts-high-class-call-girls-netflix/
A Brazilian lawyer leaves law career to become an escort and makes more money
http://www.dailymail.co.uk/news/article-4257282/Brazilian-lawyer-dumped-career-PROSTITUTE.html
Prostitute wife of British Met police officer is allowed to carry on working as a call girl after he told bosses about her £130-an-hour role as an escort
http://www.dailymail.co.uk/news/article-4283056/Wife-police-officer-carry-working-call-girl.html
I've sometimes been curious about the lives of escorts. But I've never once asked any escort I've seen any private question. Sometimes some of them do open up themselves somewhat, though, telling me their real name, giving me their private phone number, telling me about their families and their private lives, etc.
My suggestion to OP is this: if you are curious about the lives of escorts, just read memoires and biographies, as Lady Vanessa says, and see documentaries.
My 2 cents to those Perberts who provide judgmental opinion rather than information, well, have a good life. It's okay to be curious, as long as we know not to cross personal boundaries of SPs we meet.