Insight into 'third wheel" in relationship
If you trust your man 100% then why are you worrying?
Your reaction is feeding this process. What you need to address are your own reactions to her. Stop projecting your fears and you'll soon find this woman will disappear from the scene.
It's not an easy thing for anyone to do, so don't lose heart. But you must begin by asking yourself, what are you so afraid of here? Admitting that to yourself will be a big and healthy step in the right direction.
Love & light to you,