when she knew I wasn't ready
@Timbuck3 This is utterly bizarre… so this is nothing to do with how your daughter feels about it but a totally internalised process within yourself. Possibly related to unresolved feelings you had/have over having to resort to ivf and not being able to reproduce naturally.
I would suggest if you are still feeling such a weight over a very straightforward matter, then therapy might be useful to help you process past trauma.
Your daughter wasn’t adopted.
She is biologically yours.
There is no big deal over her conception except that you had a medical issue and needed some help.
For one of my DC I had to undergo several surgeries to be able to get pregnant, they’ve known since age 3!! When they started asking about pregnancy, how I felt when pregnant and so on. All explained in age appropriate language. It’s part of their story and I have never considered it necessary to “break it to them” or any such caper. In fact, they love that they were wanted and very special.
I think you’ve blown this up enormously, unless their was an egg donor or a surrogate.
At 16 she is virtually an adult, is able to work, about to drive, very likely sexually active so well aware of the process of conception. When were you going to tell her, when she becomes pregnant herself?
I’m sorry your wife excluded you from that conversation, but you put it off so many times, despite it being of little significance, that I can understand she got fed up or just thought that your daughter was so old that she would definitely be ready to hear and that you could have no objection on that basis.