My birthday celebration takes an unexpected turn as my teenage sisters, driven by a mix of sisterly love and forbidden lust, decide to give me a gift I'll never forget. They fall to their knees, their petite frames trembling with anticipation, and take turns exploring my cock with their tongues and lips. The sight of their tight, teenage bodies bent over, their pert asses sticking out, is almost too much to bear. I can't help but grip their silky hair, guiding them as they learn to pleasure me, their perverted little mouths stretching around my hardness.