[GS-425] My cousin, childhood friend, and younger sister, who all discovered their sexuality during puberty, are extremely interested in my penis! When I'm secretly masturbating... they peek in while extremely excited! Even if they're noticed, instead of running away, they come closer and say, 'Show me more,' and observe my erect penis up close. I'm getting teased a lot and, feeling bold, I try saying, 'Lick...'