One of the characters drinks a spiked drink, falls asleep, and is raped in his sleep by the other.

No 'chloroform', no 'sleeping', no 'rape'.

'Blackmail' - yes, it only happens in the end, so presence rule rules it out - but 'chloroform', 'sleeping', and 'rape'?
Why yes - let's downvote completely valid tags into oblivion.

K, I see there this is going.

Base +28, Cousinmuscle -5