No option to bite characters using seduce. Only works when characters are asleep.

[Ceejay]

This is essentially the problem, I am having this problem both with the gift mission and the moth priest, however I am now using an earlier save game so no longer doing the gift.

Essentially when I use seduce, I am not being given a bite option, I just talk to them normally, I tried sneaking and talking and just end up pick pocketing. I have tried biting my wife in the gift mission, the moth priest and cattle, however i am not being give then option to feed, unless they are asleep then I get the option. (however this is not recognised for finishing the quests.

Anyone know whats going on?
So any idea's?