God, when did his sister get so busty? Between the challenges of staying out of trouble at school and devoting his whole evenings to epic jerk-off sessions, Jacob must have missed when exactly his twin sister went up by many, many cup sizes. Come to think of it, this was the first time in a long while that he'd seen her out of a large hoodie or a puffy jacket. Still, given the sheer mind-boggling volume of her massive mammaries, it was impressive that she managed to keep them hidden from the tit-obsessed teenager.
"Emily... uuuugh..." he groaned again, his hand falling away from the tip of his throbbing length. "Your boobs..."
Though her seeming trance remained unbroken, Emily smiled wider and gently shook her enormous bosom, eliciting a strained groan from Jacob. In spite of their size,
