>>9 just like lesbians are girls who didn't meet the right guy, eh?
Just let her describe herself as assexual. After all, that's what she concluded about herself, and that by itself is significant. Flatly denying it won't bring much. Even if later she turns out to enjoy sex (just like a girl turns out to behave bisexually, even though she declares herself lesbian now), it's important that this is how she feels now.
And trust me, she has spent more time being herself than both of us ever will, so let's give her some credit.