Lots of ways a woman can become single with kids. Not only the scenario of mom-out-of wedlock can account for it, but also divorce and widowhood.
I understand. I’m just saying, the fact that she is a single mother, however it happened, is another life challenge that she has had to deal with. And for whatever reason, she chose not to share with us the details. Which is curious because she went into great detail about some other kinds of life difficulties she has faced.