In terms of a resource that was primarily intended as a safe space for straight people to find answers and support for issues directly associated with trust, deception and some form of understanding as what and why their lives have been upended, context is key. 
It is not phobic or hateful to assert that being straight is predominantly normal in terms of human sexual orientation. It is a biological necessity after all, as to this date, no man or woman has succeeded in being impregnated or been impregnated by a same sex partner. This is due to the forces of evolutionary biology, and has nothing to do with social acceptance or a desire for widespread inclusivity. In the world of the straight partner, the revelation that their chosen partner is bisexual is not experienced and felt as being anything other than the information that the disclosing partner is gay or homosexual to a certain degree. The straight aspect of a bisexual identity is irrelevant to them. That part of the sexual identity was a given. 
What modern society has forgotten is that all of the traditions and generally accepted rules about partnering with someone were there to allow for the safe and secure raising of children within the confines of a straight relationship where both masculine and feminine traits and energies would work together to provide for a balanced upbringing. The revelation after the fact that your partner is gay on some level will be felt to be destabilising to a degree. it represents a risk that there could be abandonment of the existing relationship and potentially a family at some point for the allure or temptation of a same sex relationship. This risk is of course present in a heterosexual relationship, where there is a chance that our partner finds a better option than any of us. 
The truth is that over the years  a great many of those who have used this resource for guidance and support have found that the bisexual revelation was a stopover on the journey to gay town. In ma

It should come as no surprise that someone who has constructed a false narrative should live according to that narrative. To spend sometimes entire lives, hiding in plain sight requires enormous amounts of delusional thought. They will believe that they have done the right thing by staying closeted from all of the social pathogens they imagine there to be. Whether this is due to parental expectations or a fear of being excluded, the ramifications are the same, hiding the truth. Someone who is capable of hiding the truth from themselves, is of course not going to face the reality of what they are doing or have done. Victim mentality is very powerful, particularly in modern times. It becomes both a shield and a sword, You cannot attack them with your truth, because their shield of imagined persecution protects them. Because they are ultimately the victim in the face of repression, they can cut you down with the sword of justification. Abusers will always believe they are the victim in any relationship they have, it is what makes them so very good at it. 
When it comes down to separation and divorce from these people, we have every right to tread very carefully. It is not without good reason that we fear dishonesty and selfishness. The fear that we will have to face an Anti-partner who exists now, where we thought our partners were is all too real.  Should we threaten to out those who choose to lock us in their closets? Should we accept their truths as our own? It is a moral dilemma indeed. The fact that it is a dilemma, suggests that it is because we have morals still, when they seemingly do not when it comes down to us. The closet is a prison, where the straight partner is bound in lies, and gagged by inclusivity. To the point where they are ultimately the one who is excluded.

Monkey branching into a new relationship, means that she will need a firm hold of the old one before deciding to let go and discard you. If the new one still has issues where she cannot fully commit to it, she will play both camps for as long as it suits her. A has been said, actions count much more than words. Do not stay in a relationship with a lesbian when you are contemplating children in the future. She has already shown you that  she will leave you for a woman if the chances are there. If this happens down the line when you are a father, the implications are going to be horrendous for you and your children. You have been given the opportunity to dodge a bullet that I was not given. That, or you take it for her. You could end up as the sperm donor and the free childcare that she needs to live her authentic life. You seem to be a great guy, with your heart in the right place. This heart should sit next to the heart of a straight woman who is committed to you and the relationship as well. You don’t need to accept this amount of disrespect in your life. She wants to be be gay, or bisexual or whatever she wants to feel she is to suit her own needs. That is her problem not yours. Also, if someone tells you to look somewhere else for a more ‘balanced’ view, it is because they are trying to suggest that this view is more balanced than any other. What I will say finally is, that if you accept her and her behaviour now, this normalises it. In the future, she may use this to assuage herself of any conscience challenges when it comes to the next woman she develops feelings for.

I wish you all the best in your endeavours Alex. I think it takes an enormous amount of effort and faith to navigate homosexuality in the way that you are. I will say that you have made a rod for your own back by physically and emotionally helping him to realise his homosexual fantasies from the outset. This was the actual line that shouldn’t have been crossed willingly. Since then you have negotiated with yourself as to what is and isn’t acceptable. The next time your subconscious steps in to point out to your conscious mind that something is wrong. Please don’t tell it is a ‘broken monkey brain’. It is only doing what it has evolved to do to keep you safe. It tells you what you need to hear to keep you happy. A bit like your husband and the gay counsellor. Who I expect has done very well over the last couple of years out of the ambiguity he has created.