You have been together for over last 10 years, on and off? Married for how, though? So, she breaks up with you (or you with her) satisfies her bisexual urges, then you two make up and on
xxx wants friendship you go. Now she has decided she wants both you and another woman. This really all hinges on you and your communication with your wife. At this point in time, I would advise against opening your marriage. I am in a poly/open marriage, and it takes a LOT of good solid communication between you, your wife and the other person. But you have to have stellar communication TO BEGIN WITH. Your marriage *NEEDS* to be successful. This isn't a band-aid approach to "save things". You have to consider the feelings of EVERYONE involved. You are in essence asking another person to date the both of you. This isn't a "- bragging" thing. This is a relationship and if done wrong can hurt you, your wife, the other person and your marriage. Think of it like this: How hard do you work on your marriage? Now multiply that times 2. Everything is harder because you need to take everything into account. Work schedules, downtime schedules, who does what on days off with whom? Is she going to live with you? sharing? Where to park vehicles? Everything from the simple to the "Who sleeps with whom and where? All in one bed? What are you going to tell friends and family? Do you have? What about having them? What if she gets pregnant? Etc, etc, etc. Sure, having sex with another person sounds "enticing", until you look at the seriousness of everything involved. You need to ask and solve the logistics of how you expect things to go before you open up your marriage. Once you do, things change. If you aren't all on board it fail, and likely with dire consequences.