Martyt,
You seem to be looking at your W's infidelity as a problem that can be resolved in accord with general principles. Let me suggest that the only general principles that apply come from answering questions like:
What do YOU want?
Do you really want R, or is that a reflex? (For example, are you wanting R because of, say, fear of D?)
What do you think can be achieved?
What do you need to heal?
I know what it is to want R. I know I wanted R from the moment my W revealed her A. I just refused to commit until I saw consistent evidence for 90 days without an interruption that my W was a great candidate for R.
You see that your W is not remorseful. She's a lousy candidate for R right now. No one here knows the future - she may stay a lousy candidate; she may become a great one.
But right now, she's a lousy candidate. Now is the time to determine your requirements for R, to lay them out, and not to commit to R unless your W willingly, unequivocally accepts them. Accepting them with gratitude is even better and may be essential.
But you're well advised to keep in mind that you can't R with an unremorseful WS. You can achieve D or a life of pain if you try.
The last general principle is about your healing. The way I word it is that you heal by processing the grief, fear, anger, and shame out of your body. IMO, that's the best way by far to survive and thrive.
You can heal, because you can control what you do. You can't control others, so you can't control the choice between D & R.
*****
Martyt,
People do evil things, but does it matter if your W has a friend who counsels cheating? Your W didn't have to act in accord with that counsel.
Something does sound off with your W's behavior. Normal people don't ask for that sort of birthday gift. Your W doesn't need to be personality disordered; she could be suffering from something else.
That doesn't need to affect your decision, either. But if your W does suffer from a mental illness, it may be easier to extend your grace.
But love is not enough to make R work. R requires both partners' total commitment.
Love is not enough.
*****
A progressive therapist, depending on their moral center, may 100% support your wife in her desire for an "Open" marriage....
Our progressive - gay in a committed relationship, not observant of any religion - MC did ask us if kinks that we discussed appealed to us, and offered help if they did. She also counseled not bringing any kink into our M until we had resolved our thoughts and feelings about the A.
We quickly indicated it was D or monogamous R for us, and our MC immediately switched to things like: the A is on the WS, not on me; honesty was the best course in all cases for us, but it was especially necessary if we wanted to R. Our MC's moral framework includes requiring her clients - us - to define their own relationship, as long as we were honest with ourselves and each other.
That worked for us, despite our differences with each other and with.
I like to keep things as simple as possible. Infidelity is traumatic. A WS heals by changing from cheater to good partner, and that can't happen unless the WS does the necessary work. The BS heals by processing grief, fear, anger, and shame out of their body.
I agree that partners need to share a moral framework that supports the M they want. I agree that a therapist who doesn't share that moral framework in the right areas can obstruct healing, recovery, R, and/or D.
But what's important is what a therapist actually does with the clients, not the labels put on the therapist externally.