Hermione and the boggart

[Erin]

No: HPFGUIDX 30260

We all know why Lupin chose not to have Harry face the boggart in 
class, but why did he not allow Hermione to tackle it? I assumed that 
her greatest fear would be the fact that she uses a Time-Turner 
getting out, and therefore the boggart would give her away, but is 
her use of the Time-Turner common knowledge among the staff? And if 
that isn't the case, why does Lupid avoid her? Does anyone else have 
any thoughts?

Erin, brand-spankin' new