He stays in her mouth.

"I enjoy seeing a woman on her knees," I said. My teacher smiled knowingly at my remark. I enjoyed seeing her on all fours, her breasts raised firmly on her chest. My cock was still in her tight, wet, warm, mouth. I reached out to cup her cheek. She closed her eyes as I marveled at her silky skin. My teacher's hard nipples were pointing out of her black, silken bra, towards which I reached my other hand.

I pinched 1 hard, pointy nipple between my thumb & index finger, & heard her draw in her breath. Squeezing it hard brought forth a moan that was quickly stifled.

I squeezed her nipple as hard as I could, & felt my cock stiffening more in her mouth as she fought to maintain her silence. As I became more aroused by her blowjob, I cruelly pinched & twisted her pointy bud. Her face twisted in pain, & a soft whimper escaped her mouth. My hard cock went deeper in her mouth, as I grabbed the back of her head, & brought it deeper into her throat. She eagerly accepted me deep into her throat, & began sliding back-&-forth.

I looked down at my teacher. She was looking up at me with my cock buried in her warm, wet mouth. I said, “I enjoy you doing this to me. I think you're a slutty woman. I love how you look in this position. I want to take pictures of you.” But right now, I was concentrating on the sublime pull of her lips on my cock.