I mean in general, she uses them regular, like when Elvis came in that night to wake her for the meltdown, she had them in then, you saw her take them out as he shouted. So she blasts music at all hours, but herself must have complete quiet to sleep.
Could it be a medical issue? We know Alberto suffers from crippling migraines, so perhaps it could be a 'gardening leave' sort of situation until he's well again. Just an idea.
Considering how frisky she is, she is very shy when it comes to her body isn't she, despite us seeing it anyway. So could that be a hurdle she isn't keen on jumping? Maybe. And of course, we have Gabby in all this too in a way.