Hey Dude it's like this say nada to her about it. She will seek out that which she wants, desires and needs. Girls change sexually as they mature, think think on a much higher level and realize sex is not intimacy or love. She very well might cuckold you at some point in the future, without you never mentioning your fetish or kink, if she hasn't already. Bad aspect is that unless your in tune with your primal senses and instincts you might never know. Learn her scents and body language. Good luck Jim