Genital warts is caused by a virus. Treating the warts does not remove the virus. Men typically do not show the warts but are, instead, carriers. The virus does not just inhabit the bodily fluids, but can also be spread by skin to skin contact. Simply wearing a condom does not completely remove your risk of infection.

You should probably be tested for the virus. If you plan to be monogamous with her forever, then the virus should be no issue in your lives. Should you be having sex with others, then you are likely to spread the virus to others.

Genital warts is probably one of the most serious STD situations in the modern world. It spreads and it's dangerous to the women, in particular.

I also thought it was rather negligent of her to mention her situation after you'd had sex. I understand, but it's sure tough.