A: No, she can sense your mood. Since the most nutritious sexual energy comes from the healthiest people, succubi have also evolved to develop high emotional intelligence. Depending on her personality, she may spoon you, sing you lullabies from the demon world, and/or even accompany you to doctor appointments. Her pheromones, normally used to induce intense sexual arousal, are released at a highly reduced level to attempt to induce basic desire, much like an antidepressant.
(Experts believe that this ability is what causes succubi to fall in love with humans easily despite there being more of an advantage to seek out multiple healthy sources of nourishment for redundancy. More research is necessary on the relation to the topic of succubus pregnancy and breeding behaviors)