Re: My true story

I don’t think your therapist was correct in saying it was a coping mechanism that brought you to the idea of cuckolding as sexual expression. In order to find more pleasure in it than threat (to your relationship), certain expectations have to be met. Chief among those is a certain level of confidence and certainty in the foundation of your relationship. While part of you fears what her sexual interaction with others could bring, the majority of your psyche is confident that she loves you and that this is an expression of your shared love, not an expression of her looking to replace you.
It would seem that Heather never really ‘got it’ and likely involved herself more for you than out of any personal interest or appreciation of the gift(s) you gave her by supporting her exploration of sexuality with others. Sadly, this happens – especially at younger ages where we lack the emotional maturity that makes cuckold work for a couple instead of work against them.