@Dogmum, it doesn’t seem that Alison is open to your position, that is, what you believe and why you believe it at this point. So, perhaps, the best thing for you to do is let that idea go and talk about other things she is open to discussing.
On the other hand, you could say to her, “Alison, I have a different opinion. You can believe what you want to, but would you be willing to hear my thoughts on the Father and Jesus?”
Then, if she is willing hear your thoughts based on the Bible, have them ready to share with her. Some of the passages might be as follows:
Isa 46:8 “Remember this and stand firm, recall it to mind, you transgressors,
Isa 46:9 remember the former things of old; for I am God, and there is no other; I am God, and there is none like me,
Isa 46:10 declaring the end from the beginning and from ancient times things not yet done, saying, ‘My counsel shall stand, and I will accomplish all my purpose,’
Isa 46:11 calling a bird of prey from the east, the man of my counsel from a far country. I have spoken, and I will bring it to pass; I have purposed, and I will do it.
Eph 1:3 Blessed be the God and Father of our Lord Jesus Christ, who has blessed us in Christ with every spiritual blessing in the heavenly places,
Eph 1:4 even as he chose us in him before the foundation of the world, that we should be holy and blameless before him. In love
Eph 1:5 he predestined us for adoption to himself as sons through Jesus Christ, according to the purpose of his will,
Eph 1:6 to the praise of his glorious grace, with which he has blessed us in the Beloved.
Rom 8:28 And we know that for those who love God all things work together for good, for those who are called according to his purpose.
Rom 8:29 For those whom he foreknew he also predestined to be conformed to the image of his Son, in order that he might be the firstborn among many brothers.
Rom 8:30 And those whom he predestined he also called, and those whom he called he also justified, and those whom he justified he also glorified.
Rom 8:31 What then shall we say to these things? If God is for us, who can be against us?
Rom 8:32 He who did not spare his own Son but gave him up for us all, how will he not also with him graciously give us all things?
In other words, God knows the end from the beginning and has planned Jesus’ coming, dying, and rising from the dead from the time before he created anything, and he has planned it all with Jesus.