My aunt (my mother's sister), who I've always loved and was kind, is coming to stay at my boarding house. In fact, I've been taking care of her by sneaking a peek at her shower and sniffing her underwear, so I've been using her as masturbation material. Just the thought of being alone with my masturbation pet in a small room makes my dick swell with anticipation, but I've become someone who doesn't wear clothes when sleeping, so I can't stand it anymore. But it's my aunt, so I was wondering if I should do it, and then she started to grab me...