During a family trip, I took a bath with my sister for the first time in a long while and was surprised by her incredibly huge breasts! I got a full erection and tried desperately to hide it, but she found out. As a virgin, I figured if I was going to be embarrassed anyway, so I begged, "Let me do it!" I even prostrated myself. My sister, taking pity on me, reluctantly agreed. I squeezed her large breasts while enjoying the loss of my virginity!
