(Step Sister Grope) Groping Her While She’s Distracted

She's sitting there, totally focused on the screen, trying to figure out how to play this damn game... Her brother comes over, pretending to help. He starts with just a casual touch on her shoulder. Then his hand slides down her back. She's so into the phone she barely notices at first. That's when he really starts to grope her. Over her shirt at first, feeling up her tits from behind. His hands get bolder, slipping under her top to feel skin. She lets out a little gasp but doesn't pull away—maybe she likes it, maybe she's too shocked to move. He keeps one hand on the phone like he's showing her something, but his other hand is all over his step sister. Squeezing her ass through her shorts, then sliding his fingers along the inside of her thigh. She squirms a bit but doesn't stop him.