So, this is a tricky question, if she has hpv it will be in her throat deep in the throat, for the virus to be transmited it should have finished the
incubation period, not to mention saliva is very hostile, so,30 minutes are not enough for incubation and shedding, hpv is a skin infecting virus, so all it takes is skin to skin contact, but again your chances are quite slim. Plus you have an immune system that also protects you, I wouldn't worry about hpv.