My older sister started working at a men's massage parlor, but I made her practice massages too hard! (Wing Dance SONE-103)

My sister works at a men's grooming salon!? That's not pornography... Hmm, I want to practice to learn!? Under her lewd and intense massage, my penis became rock hard! Seeing this, my sister excitedly crossed the line and began massaging my vagina! Once she started, she couldn't stop! Slippery masturbation, ball-licking, soft, huge breast play, and unbearable cowgirl penetration—it was all massage practice, so it's okay, right? Gradually, we both began to seek each other out, and finally, our massages were perfectly synchronized! "...This is our secret!"