Pussy Sewing?

My girlfriend of 2 years is very submissive. She introduced it to me gradually and I gradually came to indulge her in it. She's beautiful, perfect body, dark brown hair, and had given BJs and got fucked before me I was the first one who buttfucked her. I do travel a decent amount and I am due to go again for 12 days, I leave in 2 days. She has always been into pain, but this time has asked me to sew her pussy lips shut. She actually wants me to take needle and thread, sanitized and wants me to sew her pussy closed. She can still get pee through it, though wiping up inside after won't be happening. She has worn a chastity belt; again, at her urging, but she wants more. I don't know if there is anything bad that can happen from that. She isn't due for her period before I'd come back to take the stitches out and fuck her again, but damn. I just don't know.

It's intriguing but I don't know if there is any possible bad reactions she could have. She is playing like I need to do this so I KNOW she hasn't been fucking. I've used needles on her tits before, her mouth lips, even a few times in her pussy but this is something I'm not sure I should do. I do love the fact she wants to be totally "inactive" down there while I'm gone.