Her massive ass is the only thing on his mind as he plays, his cock throbbing in his pants. She's in the room, oblivious, engrossed in her own game. He can't help but imagine her big, round cheeks jiggling as he fucks her from behind, his hands gripping that ass tightly. The fantasy is too much, and he cums hard, his load dripping down his hand and onto the floor, a testament to his pent-up desire.