I decided to tell Garren everything. I stashed the bug away before talking to him (since if i got it on me Abram would know i betrayed him and disappear). Garren tells me to go back to Abram and report that i failed my mission or something like that and to aquire more informations about him and his motives. But i can't talk to Abram anymore, he just tells me that he won't speak to me until i've done what he asked