You felt as if you weren't ready for the weight of breasts as you decided you wanted her panties, the pink filly panties felt tight as they went on your hips, but soon you felt your dick retracting, leaving a nice soft vagina in it's place, but this wasn't any vagina, it was your sisters, you could see her in the other room as she pulled up her skirt to see male underpants and a huge erect dick there. But you wanted MORE, what do you want next?