No One Else Would Understand - Only We Know How Special Our Bond Is

I was dreading telling my stepson about my divorce with his stepfather. I believed he would be pleased in honesty, things had been frosty between us for so long, I was aware of how uncomfortable for him to live with. No, i was dreading telling him because of the reason behind the divorce. How could I explain such a thing? How could I tell him that his stepfather believed my relationship with my stepson to be unnatural? Who would think such a thing. Why did my stepson react in the way he did to our conversation? Why was he not quick to dispute his STEPfathers suggestion that his stepson wanted me?