[GS-276] I was made to drink an aphrodisiac by my younger sister and she ended up observing my erect penis! It was a hot summer day, and I drank the beverage she handed me without knowing it was part of her plan. Later on, wle I was sound asleep, my fully erect penis caught my sister's attention and she curiously observed it. But just watcng wasn't enough for her, so she gave me a deep throat blowjob!