We had a pair of close siblings take on a thrilling mission to test their bond! To make it even more exciting, we had the younger brother take Viagra and then had the sister and brother spend the night under one roof for an intense experience! As time passed, his crotch swelled up and he began to look like a man. The sister, though confused, said 'We're siblings...' but couldn't help but be aroused by her brother's fully erect penis! The two, unable to stop their excitement, rushed headlong into breeding mode!
