Are women in danger of getting cancer from Cunnilingus ?

My wife 48 and just post menopause , does not have as much interest in , as before . She suffers a little from Hypochondria ; she thinks that my mouth and tongue must be dirty , even though I have just cleaned my teeth , rinsed my mouth and gargled with listerine ; that she might get cancer from my putting my tongue in her . It is alright for me to put my inside her till I c.u.m. as many times as I want ; though I think that would be a greater health risk , I do not say so . My wife is beautiful with the body of a teenager . I enjoy making love to her in every way , especially the intimacy of Cunnilingus . Experts please advise .