I have been thinking about a response along the lines of:
'I'm glad you like the presents and thank you for the message. Whilst it does hurt, this situation has provided me with a gift that not many get the chance to receive. To be able to look hard and learn about myself, to be able to instigate change to make myself a better person.
I too am sorry for my part in our situation, that you feel like you do and the things I have done that have contributed to those feelings. But there has been enough looking into the past for now. I intend to use those lessons to focus on the future, to learn and to make myself a better father and a better man. For this I thank you x'
