THE CORRECT ANSWER WAS:

Who gives a shit what she does?

You can't control other people, so why waste your time trying? If somebody's going to cheat on you, they're much more likely to do it at work than they are on a holiday.

theyll Do it when youb think it least likely, not when You expect it the most..

Plus, what if they do cheat?
BIG FUCKING DEAL...

SEX IS A VERY INTIMATE, YET EXTREMELY BRIEF HANDSHAKE

If someone shakes hands with another person, does their hand become damaged goods?

You can't live your life in fear of hypothetical scenarios, and very often, certain men are so jealous and insecure, that they continually suspect infidelity and make accusations

which is the fastest way to lose her

what if she had sex with somebody?
Just like a handshake, it's soon over, and it's not like that moment of contact lives on forever.. It quickly becomes a long forgotten memory.. hell, congratulate her.. she deserves to experience as many eclectic things as possible in her life.

You should encourage her to follow her instincts, And stop being such a coward.. infidelity happens, more often than not, if given enough time

YOU HAVE ZERO SELF CONFIDENCE
YOU HAVE AN INFERIORITY COMPLEX
YOU HAVE A FEAR OF ABANDONMENT

You have to learn to simply NOT CARE WHAT OTHER PEOPLE DO

And just focus on keeping yourself smiling

If this is the way you think, you would be a terrible boyfriend... You would be horrible spouse...

(Plus, guys like you always secretly WANT it to happen, for some weird reason... That's why you keep pushing the subject.. trust me... You guys actually want it to happen, so you can be the victim)

grow the fuck up, little boy

she's allowed to do whatever the fuck she wants to do. And she doesn't need your permission