Joseph watched hungrily as Holly slowly unbuttoned her top, her impressive bosom straining to be let free until the last button came undone and they were let loose with a little bounce. His cock was eager to rest between them again. It had been a while since he had last tit-fucked her, and he was eager to rectify that. Watching his mother play with them only made him want it more. "That certainly contributed." he said with a grin. He had noticed how much Holly had been developing, which had helped lead to his lusting for her. His mother finally pressed Holly's breast to his member, and he was reminded of how good it felt to be between her plump tits. The always hugged his cock tightly, and always squeezed plenty of cum out of it. "Mmmm, its been too long since we've done this." he said happily, starting to move his hips against her perky breasts.