It's Okay, She's My Stepsister #07 - Skylar Vox & Billy Boston

Skylar Vox is relaxing on the couch, unaware that her stepbrother Billy Boston is jerking off while looking at her. He uses his phone to take a photo of his dick while including Skylar in the picture, then sneaks away as he sends her the photo. When Skylar sees the photo of a dick in the foreground while SHE'S in the background, she realizes what happened and confronts Billy.