turning in the thief is the opposite of helping him lmao he'd be in jail and unable to introduce you to minervus
the skill checks for hoffman's trial are: (1) alluring figure, (2) stimulating touch, (3) enticing visage: lower body, (4) aura: shared stimulation, (5) addictive body, and (6) aura: amplified orgasm
the skill checks don't make a difference, btw. it only changes the flavour text at the very end for how hoffman evaluates you. all of them result in the player passing
the cat girl poisoning skill check is lesser olfactory sense, which you get from the ratkin in the dungeon