FJIN-158A - My friend's sister is shaking her ass at me, turns out she's a total slutty pushover

She's shaking her ass right in my face on purpose, the view is insane! How can I resist when my friend's gal sister is blatantly teasing me with her huge butt? I couldn't hold back, and it turns out she's a total pushover in bed, making it even more satisfying to break her down!