If Orihime hadn't mentioned not knowing her own parents, Tatsumaki might have gotten more defensive and told her to mind her own business. Instead, she was very matter of fact about the deaths and the order of them.

"Four years ago. They died in a car accident when I was eight. I was living with my grandparents...but then my grandmother got sick, and my grandfather died in a freak natural disaster last year. So now I have foster parents."