Idk if this is appropriate, but this is probably the best scenario for all involved, even though this chick will probably be scarred for life emotionally from the ordeal.
On a bit of personal advice, if you're not planning on having kids or being in a long-term relationship, I'd consider a vasectomy. No reason to continue shooting a loaded gun.
If I ever get to that point with a SO, I'm going to do it.