In a thread I started about the Morgoth/Luthien incident I brought up rape. Then I read some HoME (X, Laws and Customs...) and found this-
Quote:
|
there is no record of any among the Elves that took another's spouse by force... one so forced would have rejected bodily life and passed to Mandos
|
If the orcs had attempted to rape Celebrian, it seems she would have "died". So, since she was rescued alive I would assume she was not raped.
However, it's very likely she was tickled mercilessly- a preferred method of torment amongst all who learned under Melkor's tutelage.