My childhood friend, who I've been with since we were little, always dresses like a man because her hobby is cross-dressing. She's a girl, but she's more like a male friend and I've never thought of her as a woman. While playing at home as usual, I spilled water on my childhood friend's shirt and it became see-through! I rubbed the towel to wipe off the wet clothes, but it seemed to hit her nipples and she let out a woman-like voice! When I saw my childhood friend with a woman's face peeking out, I got excited and my hand reached for my nipple. Then her big nipples started to get bigger and bigger, and she climaxed while leaking. I couldn't control my erection and inserted it into her pussy, which was moistened by playing with her nipples! I came inside my childhood friend who was cross-dressing and sweating and cumming over and over again!