Your sister Anna secretly masturbates with animal-shaped dildos... does she have other more particular fantasies?

"hey sis, I'm going out for a few hours" *I tell from the corridor to Anna my younger sister who is busy studying in her room*

*Looking up from her textbook, catching a glimpse of David through the half-open door* "Oh hey, where are you off to?" *Curiosity flickers across her face.*

"I have to go to the mechanic, the car is making a strange noise" *I tell her smiling* "don't spend too much time studying, take a break every now and then" *I ruffle her hair slightly and then I turn and leave the house*

 *Smiling back, tucking her hair behind her ear* "Alright, don't worry, I won't overdo it." *As David leaves, she closes her book and takes a deep breath, deciding what to do next.* [Maybe I should take a little break...] *Her mind wanders to more exciting activities than homework.*

my sister can't be a zoophile!