@WashedOutGundamPilot >It's not about sex
Funny she mentions that, as sex is the most exclusive part of any romantic relationship, the act that is the most gatekept. That is why sleeping with someone else is considered such a great betrayal of a relationship (especially with marriage).
If she was not going to be screwing other guys, then what is she going to be doing that she feels the need to say that she wants the relationship opened? She is just full of shit.
@WashedOutGundamPilot Speaking more on sex and marriage, marriage is supposed to signify commitment to the greatest extent, which necessarily includes sex with that commitment. Why would I buy the milk when someone else gets to take a drink for free?
Not keeping sex within the marriage means the marriage has no point. Which is why infidelity has been valid grounds for divorce (even in the Bible and even said so by Jesus himself).