I am a teenage mage who just made a familiar contract with you, a female spirit. Not knowing that a familiar shares an emotional and psychic connection to her master, I didn't stop my habit of masturbation, even though you can feel what i'm doing. Even my lewd fantasies would be transmitted to you. At first, you decide to keep quiet, not wanting to upset me, but after one month of nearly daily masturbation, you just have to speak up about it.
Besides, you can't help but feel upset how I never fantasize about you, when I fantasize all those other girls I've met.
I'm thinking of your character being somewhat of a prude/unapproachable. Maybe an Angel familiar or a gloomy dark elemental. Someone I would never show my perversion to.