Hi, I have been writing letterbox contact for over ten years now. I write contact letters to BM from me, they are not from the children.
My children refer to BM by her christian name, I am mummy. BM signs herself off by her christian name as anything else is too confusing for my children at present, this is compounded by the fact that both have SN and were removed shortly after birth, so have only ever called one person mummy and that is me.
My letterbox contact is an informal agreement and I will do what benefits my children whilst also trying to minimise any upset and distress, they have already experienced enough trauma and loss as it is, which was beyond my control and happened before I was lucky enough to become their mum. This is however one area that I can be responsible for.
For quite a few years it felt like I had 3 children, that I had to consider because I was feeling sad for her at some level and how her life is and feeling sad that she did not have the opportunities like I had etc, but in the end I had to stop and think what is best for my children only, I could not carry on feeling responsible for her feelings (I still do feel it a bit though, if I am honest, whatever her actions were that caused my childrens complex difficulties)
My children know all about their BM, I want them to know it is their right, I am able to also tell them about when I met her and what she likes and what she was like, and also what she is up to and how she is according to her contact letters and have done from an early age, I have made sure of it.
Stick to your guns, your feelings are valid and do not apologise for them. It will save you a lot of heartache and frustration for future contacts. Good luck and I hope you are ok, it is very upsetting.