Marx, “we” don’t know about the supposed singer, but i believe she was a child in any case.
The header of the teshuvos are always about about krias shema etc… I don’t have time at the moment to look at his teshuva in YO, but I’m pretty sure it begins that way too; you can’t be medayak from the fact that he just ends off saying it’s not ervah that it means you can listen to it. It’s not a pasuk in chumash.