I was diagnosed with High Risk HPV as well but that shouldn't stop any woman from wanting to be intimate with her man. Although, with her taking the vaccinations, it would probably be best to wait until all 3 are completed just in case you carry one of the 4 strains it guards against. About not getting cervical cancer, with technology, things shouldn't progress into full fledged cervical cancer have-to-take-the-uterus kind of deal so long as she keeps on track of her appointments and remains healthy. Besides, her biopsy came back negative to precancerous cells, right? She shouldn't have anything to worry about.
By practicing abstinence, yeah, it'll reduce cancer. LOL but then again, if she's with only you, not a ton of guys, then she's just as fine. If you're really worried about it, consult a doctor and he could give a better answer. But there are tons women on here with High Risk HPV and have great sex lives.