MIAA-018 — Insert My Dick All The Way In! My Girlfriend's Sister Keeps Teasing Me By Not Letting Me Insert The Tip Of My Dick In, And I'm Living A Life Of Endurance With My Affair Yui Hatano

"This isn't cheating, right?" When my girlfriend's sister found out I was a virgin, she started seducing me in various ways... To be honest, I'm happy because she's a really beautiful woman, but she has a girlfriend... "It's cheating to go deep, but it's okay if it's just the tip!" She teases me by rubbing her pussy against my glans. I secretly insert it in various places, hiding it from my girlfriend! Isn't this cheating... (sweat)