Oh at first, I thought you would have been shocked if
Scarlet56 agreed with me. So, it's OK
Sophia has not had a number of experiences, whether she has remained single, whether she is in a relationship with a woman, whether she is a mother or not, does not change anything.
It is certain that single without children, she could have done more of these experiences without constraints.
At the start of the game, we learn that she comes from a wealthy family, maybe it was a very strict family to preserve its reputation. And that she couldn't do what she wanted.
So far, these are only guesses, maybe there will be indirect clues in the future. L&P makes a lot of references to literature, cinema, opera, etc. I don't think it's just coincidences.