I agree with you, this should have been a conversation since she was born. It is a "matter of fact" in her life.
It seems to be your husband who really has the emotional problem with this.. Has he ever been to therapy to be able to discuss why? Has he ever really told you the bottom line on what bothers him about this? Does his family know about the donation?
Your daughter really needs to know at some point because if she ever has health issues, isn't she going to need to know what her donor mothers family genetic history is? Or will that not matter in her future?
Children are VERY resilient. I think many parents do not realize or give enough credit to what their children can handle. Since you missed the time with the summer, I do think you should first start of with the reproduction and body awareness discussions. This is the right time to do this anyway.. Then once your daughter has this information and has settled into school, you can move on to the donor issue.
You do realize there is no reason for you and especially for your husband to feel any shame about this? Does your and his family know?
We have always been very honest with our daughter on all subjects because we wanted her to trust us. We wanted her to know we do not have secrets in this family, so she does not need to have secrets with us.
The school issue is very telling. We all want to protect our children from feeling fear, loneliness and being unhappy, but these are human feelings.
This is a safe way for her to realize she can handle this situation. She was placed in this room with this teacher for a reason. She is going to do great.
If you stay strong with your daughter about her new class and "opportunity to make even MORE friends".. this all of a sudden sounds like an adventure and opportunity to meet and include other people into her life!
This is a chance for her expand her friendships. If mom and dad interfere, they are sending the message she cannot handle this situation... This sounds familiar, doesn't it?
Help her realize she is a strong young lady. That life is about facing our fears. That we CAN succeed and handle the things that first frightened us.
Once she has that "Ah Ha" moment (thank you Oprah) it will be time to ease into her biological history..
You can all handle the truth. It takes confidence, honesty and lots of trust amongst the 3 of you. She is a miracle. She is special. She is strong. You need to give her credit for all of this.
I am sending you strength.