Could indirectly be asking if you're married but even knowing that should be irrelevant for the service she is providing.
I've had girls ask that. Just because she is an SP doesn't mean she isn't worried about becoming a home wrecker. Some do honestly have that concern. SP are still human.
Back to the OP, he got his answer from the SP. She was trying to smoothly convert it to an outcall. But the wording choices set off the wrong vibe. Sometimes just being direct and not beating around the bush would be the best approaches.
"Hey John, my incall ideally would be before 2pm. I want for us to meet, if you're okay with an outcall, that would be awesome
. But if you got the same problem as me, lets try to book it between these times."