She castrates you expertly.

Her other hand joins the other with a small curved brass scalpel in hand. You hear a tiny wet noise as it cuts in a circle around your scrotum, totally removing the skin of your scrotum. Her other hand plucks it off to expose your bare pink balls...

The lamia pinches one cord hard- forcing you to flinch as pain rushes to your head already, but you can dimly make out the glint of magic about her closed fingertips. "Just petrifying where the cut will be." She explains calmly, before drawing her scalpel along the top of your pinched testicular cord...

It's severed cleanly, and she raises it by its cut cord to dangle it above your head with a smile. "What a healthy specimen! To think, you'd let me take it instead of having children." She remarks as she studies your ball... it's lifted closer to her face- "Mmmnh." She grunts as she swallows it past her lush lips, then gulps it down to her stomach.

Her expression lights up after eating your ball, the sight of which has you trembling in terror. "Oh, that was good! Here, have some titty." She exclaims, while pulling you slightly up so that one of her bronze-skinned tits is in your face. You obediently suck her nipple, and surprisingly, it makes you feel a little better...

You startle as your next cord is pinched and cut- it takes only about a second and a half... and you watch her dangle it onto her lips, then push them over and swallow your last testicle. You have been fully castrated.

Tears well up in your eyes and you groan into her titty as it rests atop your face. You can feel her stitching your wound shut- "Shhh, you did fine. I'm not normally into the aftercare, but you were quite brave to give those up." She praises to you before carefully sewing you up shut.

Sure enough, she is a healer- your crotch is smooth and tight where your balls used to be, below your throbbing pink dick. A neatly-tied ribbon of white thread stitches you shut: she somehow did the deed almost bloodlessly.